Alexis' v-rex is up for sale after many years of great riding.  It's the old square channel seat rail and has definitely seen some miles, but it's a bombproof machine.  The wheels have never gone out of true and it's nothing but dependable.  It has 152mm cranks and will fit anyone from 5' up to my 6'1" for sure.  I can include the rans big bag that comes with it.  It has a terracycle idler (MUCH improved performance and quiet) and the shallow seat pad to lower the seat eight and decrease the weight.
 
I'm thinking 650 takes it.