Athlon XP 1800+
512mb DDR RAM @ 333MhZ
GeForce 4 Ti4200, 128mb
80GB HD
15"LCD monitor
That's pretty well the essentials. I also have a pretty solid stereo speaker system with huge speakers which can really pump the sound if you want it to

In the next few months, I'm buying a new machine of slightly newer configuration, but not much different...