Personally, I trust Gigabyte boards more than Biostar. However, that Biostar gets great reviews and it even manages to enable the 4th core of the X3 720 some times. It may be worth trying.
Add an Antec 300 and a Corsair 750TX, a WD 640GB Caviar Black $75, a SH-S223Q burner $27. Total about $260 for those.
Actually, seeing that you still have $100 left, you could get the Phenom II 955. I'm not saying you should, not just for gaming. It will only make a difference when playing FSX or GTA 4 or compressing videos and so on. Future games might benefit from a quad, but I don't expect much soon. Anyway, if you do get the quad, it will last longer, so it may be worth it after all. You decide. If you do get it, use this combo to save $30:
http://www.newegg.com/Product/Comb [...] mbo.190735
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