@ Jarod: Good to hear about your experience with the temperature rating of the GoLite quilt. I'm 5'6'', so I would go with the short version. It's supposed to have 7.3 oz of 800+ fill while the seemingly gold standard Nunatak Arc Ghost quilt (rated to 32 F) has 7 oz of fill in the small version. Maybe that's why the GoLite 1+ season quilt can be pushed past 40 F? Also, @ David, good to hear about the width of the GoLite quilt. I tend to toss and turn sometimes, so I think the extra width would help.
@ Rakesh: Your point about having a wider, custom-made Spirit 30 is good. The one really attractive thing to me about the Spirit 30 is that the foot box be completely opened so that it can be used as a normal blanket or comforter. Have you ever used that feature or think it's useful?
Unless some one wants to sell me there Nunatak Arc Ghost, it's a little out of my price range. What about the Nunatak Arc A.T.? That one I might be able to splurge for, and it's so light I wouldn't mind carrying a heavier jacket to use with it. Or is the Arc A.T. just a bad idea for me?