I did not size up, seems pretty true to size to me. I normally run a large in my other Sitka stuff and run large in the dew point also, layering has been fine with this setup.
Have had the jacket and pants for a couple years and it’s pretty much always in my pack. Does a great job, keeps you dry, sheds wind and pretty durable as long as don’t get crazy with it.
I shoot the S100 single bevel. They have flown well for me and are a very tough head. I would probably also look at the Evolution fixed blade if I were buying new as I have heard they fly really good and are quite a bit less expensive. Overall the Iron Will has been a great head for me just costly.