Q6600 or Q9450

[The Hitman]

Im doing a small upgrade from an e6600 and a tacky asrock 4coredual vista board.
Iv'e pick out me mb and ram ect but i need to know which cpu to go for.This upgrade is to last me for the next few yrs as money will be tight . I do a lot of online gameing and a lot of encodeing as well. Thought please Gents and Ladies if any out there

 

[The Hitman]

E6600 dual core 2.4Gnz
Asrock 4CoreDual Vista MB
750 Gig SpinPoint F1 Sata 2 hd
2 Gig Samsung ddr 2 667mhz
2 old ide drives not worth mentioning about
2 x BenQ 1640 writers
1x Plextor sata
1x external Liteon 20x
Ati 3870
Thermaltake 850watt PSU
Crappy 19 inch AMW Monitor max res 1280x1024

New Spec System upgrade with some of my old parts

Asus P5KC Combo Intel P35 (Socket 775) PCI-Express DDR2 & DDR3 Motherboard

2x 750 Gig SpinPoint F1 Sata 2 hd
2 x BenQ 1640 writers
1x Plextor sata
1x external Liteon 20x
Ati 3870
Thermaltake 850watt PSU
4 Gig 800mhz memory . Not sure which sort to get
24inch monitor for watching films and playing the odd game

Which cpu
Intel Core 2 Quad Pro Q6600 "Energy Efficient SLACR 95W Edition" 2.40GHz (1066FSB) - Retail

Intel Core 2 Quad Q9450 LGA775 'Yorkfield' 2.66GHz 12MB-cache (1333FSB) Processor - Retail

This is what I entend to do .As for overclocking I'm not too sure at the moment

 

[The Hitman]

Sorry as for budget £100mb £100hd £160-£260cpu £260monitor £80 memory