Id say you may have less back problems on a bigger frame, shorter stem 58, rather than a bent way over smaller frame and a longer stem, 54.
but I wont be riding it. try test riding a few more bikes. at your Trek dealer..
a Coworker at the LBS has an Aluminum Domane.
I ride a Brompton, More.
( Hanging from a hook is my 56cm RB1 [level top tube] .... I'm 5'9" aging down from 5'10 & putting on some Kg. )
...
Last edited by fietsbob; 09-02-17 at 08:44 AM.