I went 1.7 DL for my recent purchase for two reasons. It always ends up I'm outfitting someone else which is not a problem. I enjoy showing new people the outdoor lifestyle and want the flexibility of having gear that can do it all, but mostly because of mosquitos.
I live in northern WI now and have backpacked and paddled 36 states. I frequently head up into BWCA/Quetico and the UP.
When you actually breathe in mosquitos......then you know you've got an infestation. I have been drilled through in SL hammocks.
Never again. I now have a Clark and a WBBB DL in 1.7