"MSCHAEF.COM" wrote in message news:_7qdnftXQsR5T-vcRVn-

At one point, I had been concerned about upgradability of the -600 series,
but the -681/682 are available with upgraded fences, which I assume can be
retrofitted on the -675. Other than that, the next logical upgrade seems
like a cabinet saw, if I ever get to that level of skil.

Actually, the next logical upgrade is the -479 or -480. You are getting a
better fence and can have a cast iron extension and the table board. If it
is in the pocketbook, I think a better buy that trying to upgrade later.