A new system that is suppost to come out soon. Cost $400 or $700 with 3 years of internet access for phantom based internet (use your broadband connection).
Athlon 2500+
256mb DDR (not sure on speed, most likely PC2100 or better)
Geforce FX 5200 64mb graphics
5.1 sourroud sound built in audio
40+ gb hard drive
GigaLAN
DVD rom
The specs can be upgraded to about hightest as possible or you can upgrade it yourself.
The best thing, i dont know if this has changed at all yet since i last read an article in Game informer magazine but it is suppost to play any game that is a CD or DVD, PS2, x-box, dreamcast, gamecube, PC, i dont know about mac, but play any of i believe they advertised any of the 32,000 CD or DVD games out there.