I'm going to recommend this one: http://www.tigerdirect.com/applications/SearchTools/ite.... Biostar boards always post the first time unless you install your ram wrong. I stopped using asus years ago due to their poor service and funky default bios settings, which can cause issues for inexperienced builders.
I use two biostars with my sempron 140 cpus. Only issue I had was a bad dvi port; biostar replaced the board in about ten days. Their rma turnaround has been faster than anyone else. I've tried all the brands in the last twenty years; bought at least 20 frys combo specials when the board was free with cpu purchase.