I have icebreaker merino boxers that I love. However, I dislike my icebreaker merino long sleeve (200 weight?). Aside from being too warm for this early, it also has that scratchy wool feel to it. Last weekend, my buddy raved about the perfection of his kuiu peleton (140?). I'll probably own one soon.
I stay pretty warm usually but need to pick up some lightweight merino bottoms because I hate sleeping in my hunting pants.
I wore my kryptek Valhalla shirt the last two days in lieu of the merino and it was also too warm but much more comfortable. Also, I keep a plain 100% polyester t-shirt in my pack for mid-day hiking to avoid a bunch of extra sweat on my hunting shirts.