It's really not that amazing, dwain. although it's certainly not a cheapo. Cost me just a few bucks over $1000 when I put it together last summer. I
posted about my building experience on tl when I finished it, but here's the short parts list.
Processor: i5-750 overclocked to 3.2Ghz, hits 3.8Ghz in single threaded apps
RAM: 4GB 1600Mhz G.Skill Eco Series
Graphics Card: Sapphire Radeon 5770
PSU: Seasonic 520W 80 Plus Bronze
Hard Drive: 1TB Samsung Spinpoint F3
Case: Antec 902
Nothing crazy, and would be even cheaper to build now, but easily maxes out SC2 at my monitor's resolution (1680x1050) and honestly I could probably stream with it or at least stand to record in higher than medium quality if my ISP's upload speed wasn't so anemic. ~300KB or so. For reference, this GotW was about 450 MB and it took between 3 and 4 hours to upload (that's based on blip's guesswork, I just set the thing to upload and went to work). Fortunately, SC2 looks quite nice at medium settings.