trust me, you will get addicted LOL. i jsut finished building my rig last saturday and im so hooked on everything. i finished sleeving my cables(all of them,power ,fans etc.) and it dropepd my temps so much. i wuld advise do that. also dont forget to get a heatsink fan and arctic silver 5. for the heatsink fan you can get the thermaltake big typhoon(50 bucks) that has the heatsinkm and fan or another good choice is the thermalright xp-90 or xp-90c(copper, better but more money,both around 50 bucks) but you would need to get a 92mm fan for it.
AMD Athlon 64 x2 3800+
DFI Lanparty NF4 SLI-DR
OCZ Gold DDR400 2GB(2x1GB)
OCZ ModStream 520 Watt PSU
Creative Soundblaster X-FI Extreme Music 24-Bit
Western Digital Raptor 36GB and Caviar 160GB
Thermaltake Armor Full Tower