I'm going solely by geometry charts; we have one or two Surly dealers around here, but they don't have the smaller sizes on the floor.

Side note: I'm not enamored of that weird green color for 2013. Also not a fan of black, for some reason. I'd buy the frameset and have it sandblasted and powder-coated in British racing green. That way I can build it up with more "road" parts.