So here's my dilemma: I have a 15 degree Big Agnes Lost Ranger that I use as my TQ. Seems to work well without the down in the underside, however with 650fp down the 15 degree rating is probably pushing it a little. I am now in the market for a down UQ.

My question is should I try to match the temp rating of the UQ to the TQ or does that really matter? What do the pros do?

Shug buddy help me out here. Heck anyone help me out cause I'm ready to spend some $. I would make it myself but after just finishing my DIY Ogee I need a short break from the ole thread injector and the frustration that my perfectionism brings with it. Thanks in advance peeps for the responses!