It depends on where at in sc I am sure. If you are in western sc you might want to have a second one good to 0. If I were buying one for year around I'd get the lowest I could. A tq is used by ultralight backpackers now anyways because they have their pad under them. I will have several for different seasons when I get to somewhere I need more than a thin sheet for insulation, but for now my 60*tq (pl) is great and wouldn't hope for anything different.
"We do not go to the green woods and crystal waters to rough it, we go to smooth it."- G. W. Sears
My forum name is Fish<><; I'm in the navy; and I hate sleeping on the ground. If I didn't need ground to walk on or measure resistance to, I think I could happily give it up.