I have a NF Fission from a few years ago that I've been thinking of selling. I bought it a few years ago because it was so light for a synthetic bag but I've found that I always tend to use my down bag for most trips. I was thinking 100 plus shipping? Other then about 3-4 nights its spend most of its life in the gear closest.
Cheers, Rob

Get a western mountaineering alpinlte or badger. You won't regret it.

Another vote for WM. Check out the Alpinlite, Versalite, Badger, and Apache.

That's one - it's really big, which may or may not be good for you. Tighter is warmer and lighter if you're not a bigger person.

The Apache is a trimmer cut, which will feel warmer if you don't fill out the Badger, and it's much lighter.

The Alpinlite and Versalite are lighter and more compact yet, and rated at 20 and 10 degrees. They use lighter shell fabrics which are less durable.

It's a pretty sizable investment - spend some time on their page reading the details. Remember that they are rated conservatively, so a 20degree WM bag is usually going to sleep quite a bit warmer than a "normal" brand. 10 degrees is probably a good guess.

http://www.westernmountaineering.com/in ... n=Products

While it might be rated for lower temperatures than you're looking for, you could look at a Marmot Lithium. They're rated as 0 degree bags, but only weigh 2 3/4 pounds. I'm amazed at how small mine compresses and the feel of the material is great. It's my favorite down bag out of the four I own.

WM is generally a solid choice.

I'm sure Western Mountaineering is, a "solid choice."
However, there are many good choices.
Marmot Pinnacle, for example. 15 degrees, great bag.
I have it, used to sell them, in fact, and think that it is a very solid bag, as well.
Good luck.

http://www.rei.com/product/731794