They've (esp the XLE) has been well received over at overclocking site. Not really what you asked but the asrock extreme 4 seems the most problem free (I ended up with msi p67a-gd65; not real issues so far but two complaints:
jp1/jp2 block second pcie slot;
computer shuts down when it enter sleep state under load (not sure if this is intel, msi, windows issue; some folks seem to think it is related to sp1 patch for windows 7)
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The boards was not too expensive (169 including tax at MC - after $25 discount)
Btw the current biostar B+ is a model below the XLE (that's the one that is commonly available inet/microcenter). Reviews have been mostly positive esp for the price point.
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I really didn't need the msi p67a-gd65 but it was the cheapest board at the time I made my purchase.