Just wanted to thank everyone for the amazing amount of information provided here. After a 12 year motion graphics career using Macs I bought a decked out z820 several months back, and while I love it for rendering, Windows 7 is better than ever but still painful. My students being freaked by nMP prices got my gears turning and I decided to go for a 2009 MP upgrade project. Dr. Stealth's rig was just so inspirational to me. So, looked for a few days, found an externally rough dual 2.26 down in San Antonio that was bone stock. The inside was like Indy opening the Lost Ark; dusty, but clearly untouched (my face didn't melt). I had some parts sitting around from different projects including an SSD and a GTX 680, got some Crucial RAM off Amazon and a couple X5680s off eBay and turned this thing into a beast. SOOOOO pleased. It's not quite as fast as my z820 but it's a Mac and it's so much more design friendly. If the GeekBench and CineBench scores are any indicator, I'm in great shape. Thanks Dr. Stealth, MacVidCards, pastrychef, Thomas Pindelski, OrangeSVTguy and everyone for being so generous with all of your knowledge!