Yeah, I definitely would not get more than a Large in the Pro/Spring Classic. In fact, a large may give me layering room. I run hot anyway (maybe it is because we climb so much here) so I will likely never need too many layers underneath. At 30-35 degrees, I usually wear a base layer, a thicker jersey, and a shell if I think it is going to rain or be windy. My feet freeze but my body gets warm fast. Those 7 Mesh jackets (Re:gen, for example) also look really good (except I wish it had a slightly longer tail/back, but I'm not sure how the sizing runs yet. I think to be safe, I'd go with a large in any of these.