Thoughts from techie friends?

Brian and I are building new computers. THey're AMD/ATI based - I was probably going nvidia, but Newegg had a great deal on full system combo. We're going to be dualbooting Linux and XP, at least until windows 7 is fully out, and we MIGHT upgrade then. (I have several OEM system builder licenses for XP sitting around waiting for homes still.)

They have four gigs of ram each at this point. XP will not fully acknowledge 4 gig of ram, but will probably read it as approximately 3 gigs. I would like to primarily work in linux and only use XP when I have to (other option: Install XP in a virtual machine).

For the best performance assuming booting linux, should we use Wine, Cedega, Crossover Games, or said virtual machine for playing WoW? I'm not playing any other vaguely recent video games right now - the most recent I might try would be Morrowind. Cedega is flawed, but designed for gaming. Wine is less skeezy, and I know very little about Crossover. Virtual machines have the problem that you limit your resources to whatever you can spare for the virtual machine, rather than using the common pool of the host machine.

(WoW, of course, is only vaguely recent because they keep updating things with patches; almost five years old now.)

At the moment, I'm leaning towards trying Wine first, but I understand they have some problems with ATI.