DDR RAM for System

hi guys im not entirely sure what im trying to get in a new pc..im looking mostly for game

and media preformance..video encoding etc,here's what i have so far..any changes or upgrades

or help would be appreciated: i want to play doom3, unreal 2004, half life 2

hmmm AMD Athlon 64 3200 or Pentium 4 3.2C 800fsb

Antec TRUE430 430 Watt ATX12V Dual fan or enermax

*either ABIT IC7-MAX3
ASUS P4C800-E Deluxe Intel 875P
Gigabyte 8i875
or your suggestion
dont plan on going past 3.4C so prescott is not a concern

Pioneer DVR 107 8XDVDR or PLextor 8X DVDR

SB Audigy2 ZS 7.1 or M-Audio revolution

Ati Radeon 9800XT or plan for doom3 with nVidias highest GPU?

now for RAM. DUAL CHANNEL DDR: OCZ ?, Corsair TWINX? ....?
i dont know anything about latency or how it affects preformance or anything like that
but keep in mind my purpose, high end gaming, media processing/ 3d studio,encoding,dvd

thanks guys! you know your stuff !

Are you planning to actually overclock this system, or just looking for something to give good stock specs? Because I think the answer to that question will probably affect the answers people give you here.

For info an how memory latency and speed affect performance, check out some of the memory reviews at Anandtech.

If you are serious about encoding, get the P4. P4s generally beat AMD for encoding.