Well to start off.
I'd go with a 64 bit processor from AMD.
I'd go with an
AMD Athlon 64 3200+ or 3500+
Winchesters run a bit cooler then Newcastle's since they run on less voltage, and are 90nm rather then 130nm. Make sure you get a socket 939, as they make use of Dual Channel.
For the motherboard I'd go with an
MSI Neo2 Platinum
Great features, possibly the best 939 mobo out right now.
For the Ram, it all depends if you plan to overclock, if you don't then i'd recommend any of the "value series" from some of the top companies that make ram. Also be sure to get 1 gig of memory, as more and more games are starting to require more RAM, and you can use two sticks of 512MB and run them in dual channel. Any of these companies would be fine.
Corsair, Geil, OCZ, Kingston, or Mushkin.
Make sure they have good timings also, at least 2.5 3 3 7, anything lower like 2 2 2 5 would be even better.
For the video card, if you like nVidia then get a
if you like ATi then get a
X800 pro or XT
I would recommend a 6800GT, as they have support for SM3.0, which will be used in some of the newer games, and can easily overclock to ultra speeds.
For hard drives
I don't know that much about hard drives, but i'd recommend a
SATA WD Raptorfor games. and a large capacity storage drive 160Gigs or so. for your OS and other needs.
You could easily use onboard sound, but if you want a "gaming" machine, then i'd suggest
Audigy 2 ZS
no question about it.
That's all I can think about right now, but if you have anymore questions post em up.