Arc'teryx still holds the torch
I own the black in a large and I am 6'1''/180 lbs athletic build. I went with a medium first and they fit a little snug and I definitely couldn't wear anything underneath them, so I returned and got a Large and they are great. All Arc'teryx gear is top of the line but sometimes their price tag is a little perplexing...I wore these for a month in the Seward Peninsula/arctic circle region of Alaska and if it is warmer with rain (with pants on underneath) they are a little hot which may be expected but it isn't unbearable and the gore-tex breathes very well compared to any other non-goretex rain pants. They shed water nicely and with the alpha jacket in black you also look pretty badass as well!