I haven't used boards by any of the makers listed (various by Abit and MSI), but posts I've read seem to indicate the Epox and Shuttle are the best of those listed for overclocking.
I suggest that the best source of info from actual board users would be the motherboard-specific forums at amdmb.com, where you'll get a good sense of both merits and problems for the boards you're interested in.
I'd also suggest you consider RAID versions for the benefit of 4 IDE ports.
My last upgrade was to Abit KR7ARAID. The board runs fine, but if I were buying today I'd probably buy the Shuttle AK35GTR for excellent combination of overclocking, features, price and great reviews.
Hope this helps.