[wmf]

the best one would naturally get the most support

I don't think so. A "better" Bitcoin fork that has no MtGox, no BitInstant, no BitPay, no blockexplorer, etc. would probably have very low adoption.

[mkramlich]

agree and disagree. if a fork is demonstrably, significantly better, then adoption will grow and eventually, in general, the better will win. this is how evolution works.