I'd probably pop for the Sherridmuir if I had it to do over for the fact of the heat. The Montrose will be very warm in the US unless you're outside in the winter.

And the Sherrifmuir has the added advantage of allowing for more "growth" in the girth. Nothing worse than spending hundreds on a doublet you can't wear. I'm not much on the tartan vest, personally, but I do like the jacket.