Build for my brother. $500-600

I'm building a pc for my brother for Christmas. His budget is around $500-600, lower price preferable. He plays medieval 2 and will play sequels, but not games with high graphics such as Crisis. I don't have any parts except for a case and $50 Western Digital Caviar Black 640GB from Newegg today. Any suggestions from the newegg black friday sale or any sites for that matter? Here is one cpu mobo combo I was considering I don't care if I use intel or amd, I just want a good deal and I've had good experience with both companies, so don't troll. I also need a monitor, but it needs to be included in the $500-600 budget. I will not be overclocking because I am leaving for college next year and won't be around to deal with oc issues. + rep for help.

I'm also considering this psu.

I already have windows vista ultimate for him.