I have that jacket. I'm 6', 185#, and bought an XL. It has a little room, but not a sloppy fit like the TNF Denali. FWIW...I bought the Windstopper Tech Vest as well, and went with a large in that for a trimmer fit.
Other MHW stuff I own & sizes:
1. Exposure II parka - Lg
2. Manticore SS - XL
3. Synchro Jacket (on the way) - XL - only because I plan to layer underneath. If I were wearing it alone, I would have gone Lg.
4. Monkey Man fleece - XL, could have gone Lg, but it is short-waisted and has an athletic (tight) fit. May still get one though.