My Astroman in a L is a much looser fit than my Rab Pulse. The OR Echo hoody in a L is the tightest of them. I could have definitely went with a M Astroman.
5'11 170 usually L in all brands for tops
The Astroman is definitely in between the UL/thin sun shirts and the 10+ oz ones: in breathability and durability. It pills after some crack climbing, but the thinner ones would likely shred (if its warm and face only route, I'd wear the Pulse). I prefer the Rab boreas/borealis for my main climbing top but in warmer weather, they run just a little warm (still breathe great though, and are my favorite climbing shirts).
Third for the NRS. Great hood and a cut that fits my skinny body and long arms.
I've been looking for that cut.. currently have the patagonia capilene cool hoodie, and like most things patagonia it never has enough sleeve. But I do like the capilene fabric's feel. Has anyone found a similar fabric to the capilene/tropic with longer sleeves for <$60?