I know the wine tiger fleece has already gotten rave reviews here, but I just got mine in, and it is 100% worth the hype! very cozy, great color, and the key ring is a really nice touch.
Pretty sure M is the better fit, since it will give a bit after time. I guess it's also a matter of how relaxed i want the outfit to seem?
I also got the black overdye, and while it is quite thin, the fit is pretty nice and I think it's decent for a casual shirt....