The tech specs don't say so, but is there any kind of water resistance/proofing on these?
I guess you could try the large. That's what I've been thinkin about getting. I'm kinda your same dimensions. Suit would fit a lil more snug on me but that's the idea. 6'0", 185 lb, 33 waist, 17 neck, 35 sleeve. My main concern would be major wedgies if it's too short. I think with the return policy for backcountry you could return it no questions if it doesn't fit. Go for it and let the rest of us know what's up.