What would you upgrade

[Spammeh]

My 21st is a matter of a month or two away, and I think I wanna upgrade my pc.

I will have a limit of about £500 max, and really unsure what to upgrade. I do play a lot of games, I do multitask a lot, I do download a lot, I listen to a lot of music, watch a lot of movies and I am a sucker for pretty cases, etc. Here is my current spec:

MSI Neo2 Platinum
AMD x2 3800+
1gb Corsair XMS TwinX 3200
Radeon x800pro (non-vivo)
1x 30GB IDE
1x 60GB IDE
1x 160GB SATA
Dual Layer Sony DVD-RW
Soundblaster Live 5.1 Digital
Antec Sonata
LG L1915S 19" TFT

Any recommendation would be great guys, thanks

 

[Spammeh]

Any recommendations on PCI-E boards? I would love to make the upgrade, but obviously it would mean switching everything to SATA I guess too?

I 2gb of Gskill ram good, or am i best sticking with corsair nowadays?