I know, it's tough being a poor student, but come on wusy.
Sure, your xp @ 2.5ghz is every bit as good as a stock 1.8ghz A64, but I dont see you leaving it @ 1.8 for long. I'm thinking 2.6 or better, but even if you only got it to 2.4, that would be a 33% improvement.
My s754 @ 2.45 blew my xp-m @ 2.45, right away.