Well, after being unable to get my hands on an E8400 I've decided to just get a Q6600 instead. Just double checking with you gurus in case I've made a blunder but I've only made minor adjustments. I'm considering building it myself and saving $80, but I don't want to break anything - my main worry is how hard it is to secure the heat sink on the LGA775 socket and whether I need to apply thermal grease (I read that it's already on the heatsink?) One other thing I'm contemplating is buying Vista64 Home Basic or Premium OEM $121/$132, though I'd prefer to use XP.
1x Video Card PCI-e (nV) 8800GT 512MB EVGA SuperClocked 512-P3-N802-A1 $299
1x CPU/Processor Intel Core 2 Quad Q6600 (2.4GHz) LGA775 (SLACR) $269
1x Desktop DDR2 Ram 4GB Kit (2x 2048MB) PC6400 800MHz Generic $90
1x MotherBoard Intel S775 Gigabyte GA-EP35-DS3 $118
2x 3.5" HDD SATA-300 500GB 32MB Seagate (ST3500320AS) 7200.11 $236
1x Gaming Case ANTEC Sonata 3 (III) Black with Antec EarthWatts 500w PSU $175
1x 5.25" SATA DVD Buner/Rw ASUS Light Scribe DRW-2014L1T Dual Face Beige/Black $40
1x 12 Months Labour Warranty Assemble Included $80
Budget parameters $1200-$1500, my personal limit is about $1300 so it's basically spot on. As for usage, I'm a gamer and a university student, I generally play MMOs and multi task a lot and I need the PC to last for 4-5 years. Any final thoughts or comments? Maybe change the DVD-RW/GFX brand? E8400 or Q6600? All comments are welcome, thank you in advance.