Found what i assume to be a pretty dec deal online for a new steamroller, 59 cm. I've ridden the 56, which felt nice, but my friend who owns it is quite a bit shorter than I am thus leading me to believe a 59 cm bike could work for me. I am 6'0 and 150 lbs, (and a n00b; trying not to spend more than $550, that's why this deal seems pretty ill). Opinions?