SilverSon has a 50 cm Trek Pilot 1.0. I used to ride it and found it very comfortable.

It's important to note that I have a wicked bad back, but found the upright geometry very comfortable for me.

HOWEVER, I planned on buying one for myself and was talked into an alternative geometry by the LBS...they were absolutely right and I'm much happier with my 49cm Lemond Reno.

So, my advice is don't go with a preconceived notion and let the LBS advise you.