Dell. If you watch places like
www.slickdeals.net and
www.passwird.com you can get some insane deals on systems. I've seen systems with 17" lcd's and a decent setup that would do more then what you wanted for under 450$. If you have the time to wait for good rebate offers, dell all the way.
Edit: Replying to this post does not make me a computer geek!
