Coleman -10 Synthetic @ Wal-Mart. I believe it was 59.99 and for the price it's worked great for me. Leaving it stuffed I have no worries about losing much temp rating since I don't stuff it tiny, and it's cheap to replace years later if this occurs. I've used it for snow camping, and fall/spring camping (unzipped w/blanket).

The last couple days I used this in the 40*s and it was obviously too warm so I unzipped it 100%, and used my thin smartwool blanket to cover me, and adjusted covering of the bag over me under depending how cool or warm I got. Worked great.

-10 Synthetic Coleman + Surplus Wool Blankets = good range, and good when wet