I have come to like my Exped DownMat UL7 for both warmth and comfort and have not had much of an issue with side insulation unless it gets down below 30*F. For those temps I have used the ENO Hotspot with acceptable success. It occurred to me that there is only around 3 oz. difference between the ENO Hotspot and the WB 3-season Yeti. Anyone tried using a light UQ with an inflatable pad? If so, any thoughts?