So I was browsing the JRB store today, just to give myself more pipe-dreams, when I ran across (what I felt like) was a spectacular deal; a set with the sierra sniveller and the mt washington 3 for 489.95. Now the fact that I am currently flat broke aside, this seems like a great deal. However, I do have a couple questions. I have run into a few threads where people have said their 20-30* gear has kept them cozy well below that, so is it fairly common for TQ's and UQ's rated for 20-30* to be comfortable closer to 0? I do tend to be a warmer sleeper anyways, and I enjoy going places where it does drop below 10* at night. The problem is if I don't want the 4-season gear because it will be far too toasty during the spring and summer months. Thoughts about whether I could get away with just the 3-season set?