I just bought the following:
AMD Phenom II X4 810 AM3
ASUS M4A78T-E AM3 790GX ATX
8GBs of Mushkin DDR3 1600 (PC3-12800)
Corsair CMPSU-750HX ATX12V 2.3 Modular
I already have 3 74GB Raptor drives, 1 WD 1TB Black series, a full tower Antec case, internal flash media reader, SATA DVD-RW, SATA Blu-ray/DVD-RW, and a Samsung 24" T series DHCP LCD.
I haven't built an all new system since my 1.2GHz T-Bird system back in 1999/2000. I remember paying $1,015 just for the AMD processor! It was the first ever x86 processor over 1GHz. Stuff is just so wicked inexpensive now! I've just been getting by on a part here, a part there, for years.
I'm so excited and I can't wait to get it all running! I have my pre-order of Windows 7 shipping on Oct. 22nd too!
Anyway, I don't know what to do with 3 Raptors and a 1TB drive. I'm thinking RAID 0 two of the Raptors and use the 1TB for storage and just sell the 3rd Raptor for like $25, maybe put it in my kids computer.
I also made it a point to buy an AM3 proc and an AM3 board so a few years down the road I can buy the most top-of-the-line AM3 proc AMD ended up making without having to upgrade my board and memory.
I must say though I am very disappointed from a memory standpoint. The AM3 boards only have 4 dual channel DIMM slots and since there are no 4GB DDR3 DIMMs, the 4 2GB sticks I ordered are the most I can pack

Kinda sucks lol.
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AMD Phenom II X4 955BE AM3 (Multi x18.5@3712.5MHz) - 965BE On order!
Thermalright IFX-14 Lapped with AS5 (Not installed)
3 Scythe SY1425SL12H / Silverstone FP33-B (Not installed)
ASUS M4A78T-E AM3 790GX HDMI ATX
8GB Mushkin 996625 DDR3 1600 (7-7-6-18-24 - DRAM 1.86v)
Corsair CMPSU-750HX ATX12V 2.3 Modular
3 74GB WD Raptors in RAID 0 / 1TB WD Black
Pioneer SATA Blu-Ray / Plextor SATA DVD-RW