i just dont trust biostar boards for some reason(never owned one though)
oc'ing on the j&w board is quite good, got mine up to 3.4ghz on stock voltage stable. havnt prime tested it but it works flawlessly in all games (stalker/COD4/left4dead/farcry2...) with a bit of extra voltage and increasing the Northbridge i reckon i could hit 3.8ghz ish. although recent articals indicate the sweet spot is 3.4/3.6 ghz (i'll try and find the link in a mo)