Second on Zenbivy ultralight flex, best pad I’ve used and sold my Xlite NXT Max Large after comparing to Zenbivy. The flex is a weight penalty I wouldn’t give up after how good I sleep
I run a nemo tensor alpine. Quite light, small, and with good r value. Their new extreme looks interesting as well, I know it cost a bit more, I cant recall if there was much of a weight penalty in exchange for the extra insulation.