The jersey(s) I find myself wearing the most are my Castelli Partenzas. I ended up with three in various colors because the fit and comfort (and price if you're savy) is spot on for me. They vent very well in the TX summer heat, but also work well in much cooler weather. Definitely my favorite "go to" jersey.

In regard to men's sizing, I'm a solid women's medium and I find a men's small quite a bit too large.