I have a few PC's..
Main - Intel E6600, 2gb ram, 10k raptor, Soundblaster X-Fi (great buy!), 512mb x1800XT, Antec P180, Seasonic 600w.
Alternate - Athlon 3800+, 1gb ram, 1gb 7950GX2
Chess Analysis / Audio Production - Athlon XP 2500+, 1gb ram, Echo Midi
I run them all through a KVM to my 24" Dell LCD.
I use these as my speakers 30lbs each
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http://www.krksys.com/index2.php?cat...page=rokit_rp8
Oh and I have a 25 Key USB Midi controller with drum pads, an M-Audio Axiom 25, love it!