Meraxus

Ok I have Finally Decided to build my own PC from the ground up because I can't find a site that has all the options I want. Below is the list of components, Tell me what you think as far as Item Quality and Price, most of these prices are off of Newegg.com Website. Oh before the list I had 2 Questions, as far as Operating Systems what is the difference between OEM and Retail? are they exactly the same except for the box and instructions? Last question, for Graphics Cards I want a 256MB AGP 8X card, I want to wait for the Nvidia 6800 Ultra but radeon has the X800, has anyone seen anything on these cards? Which brand do you believe is better? Ok here is the list:

1. Aspire X-Alien Turbo Case w/500W PSU(was thinking of buying a better quality PSU if this one turns out to be crap). 138$

2. ABIT IC7 MAXX3. 185$

3. Prescott P4 3.0Ghz w/1MB L2 Cache W/ HT Technology. 215$

4. 1GB (2x512) PC 3200 Kingston Hyper-X Dual Channel Memory. 289.99$

5. SoundBlaster Audigy 2 ZS. 88$

6. Logitech Z-5300 5.1 THX Speakers. 139$

7. Western Digital 80 GB 7200 RPM HD. 105$

and the rest is just DVD/CD Burner, DVD rom and floppy drive.

Well that is what I have decided now i just need an OS and a kick Ass Graphics Card Any Input is greatly appreciated. Thanks guys.