If half the E3 rumours are to be believed the 360 has an incredible fall 2009 and 2010 line up with a ton of exclusive titles.
One way to look at it is Sony have already shown almost all their games where-as MS have held titles back. MS have already said whilst just concentrating on that fall line up each E3 has it's merits, this year it might be better to tease titles further out so they don't get accused of having a weaker future line up.
If anything in 6-12 months when Sony do have a very strong line-up (which they will) MS and Nintendo will have announced their next consoles thus rendering the PS3 obsolete.
To the OP; it sounds like you need a new shiny toy and the PS3 would fit bill. I would however voice caution as if you're not really playing on the 360 maybe it's gaming per se you're slightly bored of.
Are you being serious, so your saying MS have a "ton of exclusives for 09 10". Not for argumentive sake but id like you to research into that and provide some factual titles. FM3 is the biggest game they have coming, but then im a racing game fan. Please by all means see the list below and you can provide YOUR X360 list to compare. Im not interested in "Rumours"
Microsoft will NOT and Nintendo will NOT be announcing a new console in the next 6-12 months. Microsoft need to make more profit from X360 my friend. Only now are they getting profit from it but they spent billions. Nintendo just need to come up with more games to maintain good sales so i dont see them in a hurry to create a new console, no too early for that.
Playstation 3 will NOT be obsolete, thats a bleedin stupid thing to say.
For the OP i recommend you get a PS3 and enjoy both platforms, as a gamer or movie fan both consoles should offer you hours upon hours of entertainment over the next couple of years yet and theirs nothing wrong with owning more than one console you know. X360 2nd hand value makes it not really worth selling unless you need the funds from it to purchase a PS3.
Regards PS3 its best has yet to come, thats what im saying here...
Exclusive PS3 Titles Out Now
Genji: Days of the Blade (Game Republic)
Mobile Suit Gundam: Crossfire (BEC)
Resistance: Fall of Man (Insomniac Games)
Ridge Racer 7 (Namco)
Sega Golf Club (SEGA)
Mahjong Kakutou Club (Konami)
NBA 07 (SCE Studios San Diego)
Untold Legends: Dark Kingdom (SOE)
Mahjong Taikai IV (KOEI)
Full Auto 2: Battlelines (Pseudo Interactive)
MotorStorm (Evolution Studios)
Railfan: Chicago Transit (Ongakukan)
Formula One Championship Edition (SCE Studios Liverpool)
Yamasa Digi World DX (Yamasa Entertainment)
The Godfather: The Don's Edition (EA Redwood Shores)
Mist of Chaos (Idea Factory)
Winning Post 7 Maximum 2007 (Koei)
Professional Baseball Spirits 4 (Konami)
MLB 07: The Show (SCE Studios San Diego)
Ninja Gaiden Sigma (Team Ninja)
Folklore (Game Republic)
My Summer Vacation 3 (SCE Japan Studio)
Railfan: Taiwan High Speed Rail (Ongakukan)
Everybody's Golf: World Tour (Hot Shots Golf 5) (Clap Hanz / SCEI)
Wangan Midnight (Genki)
Warhawk (Incog Inc. Entertainment)
Lair (Factor 5)
Yamasa Digi World SP Pachislot Samurai Warriors (Koei)
Heavenly Sword (Ninja Theory)
Megazone 23: Aoi Garland (Compile Heart)
Record of Agarest War (Idea Factory)
NBA 08 (SCE Studios San Diego)
Eye of Judgment (SCE Japan)
Ratchet & Clank Future: Tools of Destruction (Insomniac Games)
Imabikiso (Chunsoft)
G1 Jockey 4 2007 (Koei)
Time Crisis 4 (Bandai Namco)
Uncharted: Drake's Fortune (Naughty Dog)
SingStar (SCE Studios London)
Gran Turismo 5: Prologue (Polyphony Digital)
Disgaea 3: Absence of Justice (Nippon Ichi)
MLB 08: The Show (SCE Studios San Diego)
Ryu ga Gotoku Kenzan! (Yakuza Kenzan) (Amusement Vision)
Winning Post 7 Maximum 2008 (Koei)
Valkyria Chronicles (Sega WOW)
Professional Baseball Spirits 5 (Konami)
Haze (Free Radical Design)
Metal Gear Solid 4: Guns of the Patriots (Kojima Productions)
SingStar: vol.2 (SCE Studios London)
Initial D Extreme Stage (Sega Rosso)
Buzz! Quiz TV (Relentless Software)
Ferrari Challenge Trofeo Pirelli (Eutechnyx)
Siren: Blood Curse (SCE Japan Studio)
Tears to Tiara: Earth's Wreath (Aquaplus)
Metal Gear Online (Kojima Productions)
Monster Madness: Grave Danger (Immersion Games)
National Geographic: Afrika (Rhino Studios)
Ratchet & Clank Future: Quest for Booty (Insomniac Games)
G1 Jockey 4 2008 (Koei)
Aquanaut's Holiday: Hidden Memories (Irem)
Cross Edge (Compile Heart)
NBA 09: The Inside (SCE Studios San Diego)
SOCOM: U.S. Navy SEALs Confrontation (Slant Six Games)
LittleBigPlanet (Media Molecule)
MotorStorm: Pacific Rift (Evolution Studios)
Derby Time Online (SCE Japan Studio)
Naruto: Ultimate Ninja Storm (Cyber Connect 2)
Resistance 2 (Insomniac Games)
SingStar ABBA (SCE London Studio)
SingStar Vol. 3: Party Edition (SCE London Studio)
Alone in the Dark: Inferno (Eden Studios)
White Knight Chronicles (Level 5)
Killzone 2 (Guerilla Games)
MLB 09: The Show (SCE Studios San Diego)
Demon's Souls (From Software)
Buzz!: Brain of the UK (Relentless Software)
Confirmed Future Exclusive PS3 Titles
The Agency (SOE)
Atelier Rorona (Gust)
Amphibian Man (KDV Games)
Big Time Revenge (Anygame Company)
BlazBlue: Calamity Trigger (Arc System Works)
Bumpy Trot 2 (Irem)
Codename: Sengoku 23KU (Acquire)
Dark Cloud 3 (Level 5)
DC Universe Online (SOE)
EyeDentify (SCE London Studio)
EyePet (SCE London Studio)
Final Fantasy Versus XIII (Square Enix)
Free Realms (SOE)
God of War III (SCE Studios Santa Monica)
Gran Turismo 5 (Polyphony Digital)
Heavy Rain (Quantic Dream)
Infamous (Sucker Punch Productions)
The King of Fighters XII (SNK Playmore)
Katamari Damacy Tribute (Namco Bandai)
Kurayami (Grasshopper Manufacture)
L.A. Noire (Team Bondi)
MAG: Massive Action Game (Zipper Interactive)
METRO 2033: The Last Refuge (4A Games)
Ninja Gaiden Sigma 2 (Team Ninja)
Quantum Theory (Tecmo)
Rain in Rio (Red Dingo Games)
Ratchet & Clank Future: A Crack in Time (Insomniac Games)
Redwood Falls (Kuju Entertainment)
Rengoku: The End of the Century (Neverland)
Ryu ga Gotoku 3 (Yakuza 3) (Amusement Vision)
SingStar Queen (SCE London Studio)
SuperCar Challenge (Eutechnyx)
Twisted Metal (Eat Sleep Play)
Uncharted 2: Among Thieves (Naughty Dog)
Uncharted Waters Online (Koei)
Undead Knights (Tecmo)
Under Siege (Seed Studios)
The Wall (World Forge)
WarDevil: Unleash the Beast Within (Digi Guy's)
Warriors Orochi Z (Omega Force)
White Album (Aquaplus)
ZEN Pinball (Zen Studios)