Intel Core 2 Duo E6600
2 x 1GB 800MHz Hi-Speed RAM (I forget the brand.. I think Corsair or something)
3 x 320GB Seagate SATAII HDs (So technically, just under 1 Terabyte.. hehe)
I just use the on-board HD sound.. I have two SPDIF outs plus all the normal 8.1 surround things or whatever it is these days. I've never really needed the RAM until I started routing my audio back into my computer again and out through another mixing program.. lol..
I'll definitely have to buy some power speakers as the next addition to my home studio. Mixing it all with headphone is great, I have the highest quality Sony studio headphones that were available in, I think, 2005.. so the quality is very good.. but then when I play it as an MP3 on my proper stereo system, it sounds soooo much different. Which is why I have been routing the sound back in via the mic-in socket on my computer... so I can hear it on the full speakers and record the instrument at the same time.