Hey so I know this thread has not been updated in a while, but after reading through the whole thing twice (!), I have decided to go for the Messenger. However, I can't decided on size. I'm 5'7" 1/2 and inseam is around 30 to 30.5 inches. I know some people who were similar heights got either the 52 cm or the 54 cm so I'm not sure. What do you guys recommend?