I have an under quilt that's good to about 40 but am getting sick of trying to use a pad in colder weather. I almost put the order in for a MW3 with the thought that I could double it up with my current uq if it was colder than 20. But I started thinking about it and maybe the MW4 would be a better way to go as it would mean less fiddling with gear out in the cold.

Thoughts?