Hi there, I've never built a computer before and know virtually nothing about doing so. I have a build here a friend of mine made me earlier today that prices out at $817.68 on ncix.com (I'm Canadian). I'm also looking to buy tonight as there are some deals that end tonight.
The PSU is the one place you dont want to cheap out on a build. Thermaltake aren't a great brand and a 500W supply for $40 isnt a good sign. Also its not 80+ Certified (so its voltage control and efficiency is unknown)
This PSU is a lot better.
XFX Core 550W. $70 ($10 rebate) http://www.ncix.com/products/?sku=59615&vpn=P1550SXXB9&...
Edit: Puts me at $760 after taxes & shipping (before rebates), so I guess I'm going over budget!
A common occurrence I can tell you. Pray you dont get bit by the performance bug (and now water-cooling bug) like I have.
When I first sat down to build my computer half a year ago, knowing absolutely nothing like you I planned for ~$1300 to be my budget. As of last weekend I'v now spent over $2000, with plans for more in the future.