Get the WT5, swap parts as wanted, go from there. Then you got two bikes, or I bet you could recoup a lot of your cost selling the rest of the bike.

Extra bonus points? Get a Torker The Graduate and go drum brake on the Quickbeam.

Fivespeed hub, decent rim, wheelbuild and barend shifter would probably be in the $200-250 range at a bikeshop.