I'm 6'1"/175 lbs. I tried the 3 in 1 smarty complete a couple of years ago and the Large absolutely swamped me. The Medium was baggy, but perfect.
Last season I bought a 686 plexus pinnacle shell online and just guessed the medium would fit...and it was perfect, too.
Couple months ago, tried on a plexus hydra in medium, but the tailoring had my shoulders a little too binding. In that case, a large would have been the right call (albeit, baggy)
sooo, I think 686 have changed their sizes around and/or they're just so different between models and cut (baggy, tailored, slim, etc), you're really going to need to try that particular model on to be sure (not take advice from someone that isn't your exact size and/or hasn't even tried that particular model smarty).
Last edited by extra0; 12-13-2012 at 11:25 PM.