I'm looking at picking up some new gear. I live and ride in Socal, which means 90°+F summers. I'm looking at either the RS or the SS jerseys and their new s9 bibshort. Any input on these items would be of great value; before I pull the trigger.

I'm a 5'7" height, 165lb, 40" chested dude (for clarification ). I seem to be in between sizing (M/L). I'm not skinny, but nor do I have a gut; a medium build. I'm leaning towards a size L in jersey knowing that they are aero/race cut.