Like several other members I bought a Golite Ultra 20 back in 2008. There have been a number of complaints about how little down was put in that quilt (the new version apparently has more down). After suffering from cold feet on a few occasions I decided to do something about it. My wife and I recently added 3 ounces of down (from thru-hiker) to the quilt. I really like the result.
Pictures and detailed descriptions of the project are here. It wasn't as difficult as I feared so if you are disappointed in your Golite Ultra 20 then you may want to give it a try.