Here's my suggestion for low-mid budget. Asus mboard, 3.0 ghz quad core, 4gig RAM, 650 w PS, and a decent video card. For hard drives, I've always had good luck with WD (non China versions). My choices would be as in the link.
http://secure.newegg.com/Shopping/Sh...px?Submit=view
Not sure if you can view from your location, I'll link singles if so (not logged in for shopping cart, should be able to view).