Everything looks good. That rig will last your for years. It will play the new games pretty well. If you wanna save some more money, you can drop the raptor, and get another Seagate 320gb, and RAID 0 the two. It will be near the performance of a raptor.....less money, more space. I have that motherboard...and to be honest it overclocks pretty good, but few bugs here and there. You should use the black slots. Usually the yellow slots don't work. Maybe if you update the BIOS. People here will suggest the Gigabyte 965P-DS3, or maybe the MSI P6N, instead.
Quite a few are really worried, about overclocking. I was too, before I knew about it. But the first day I got my stuff, I overclocked it right away, and worked like a charm. Overclocking is very safe, these days. This is the guide I used:
Overclocking Guide - MajorGeeks Support Forums
and the guide from TF:
Overclocking Basics and Temperature Guide
...but even if you don't overclock right now, the e6600 is powerful enough at stock.