I'm actually snugly within medium for everything except Primal and LG, so we're good on sizing. The Sugoi shorts fit me well, but I don't want the bulkier chamois that's in the newer Evolution shorts.
You might not like the Elite 3D chamois in those PI shorts I mentined--it's similar to the newer Sugoi chamois, I think. It works OK for me, since the footprint fits my sit-bones and girly bits pretty well, but it could be a bit less bulky and I'd not mind.