I recently purchased a 2014 Specialized Vita Comp in an XS frame. That's the only size I could straddle while standing over the bike. I too was looking at the FX (7.5) but felt I got a better fit with the Vita, plus the bike shop spent a good 2 hours with me measuring angles and getting everything set up so I could accurately test out the rides between a 's' size frame and the 'xs' size frame. The Trek bike shop didn't do anything more than adjust seat height. I went with the Specialized as the whole experience was just better and the XS frame was the right size for me.