Hi Brad
Welcome to the board. It would seem to me that you have already made up your mind! I personally would go for the higher voltage, but then I like faster better than slower:) The comment about the alloy fork is especially important, but Alan has come up with a cheap easy cure: epoxy bond the head of an open end wrench to the drop outs to keep them from being spread open by the torque. ( And don't try to tell us you wont use much torque. When you get used to a little bit, and more is available, guys always wind up using full throttle:) )
Have fun!
TTFN,
Dennis