We "saved" a stray and, while doing so, investigated alot of different kitty food choices. After being on the higher quality food for a couple of months her coat was completely restored - unbelievable. It was brown, white and almost black with some silvery hairs. It ended up being a beautiful multi-dimensional white and gray which was incredibly soft. She also started acting like a kitty again.
I had started her on Iams Kitten - it was what was available when I found myself as a new cat owner on a Sunday night. She liked it a lot. After doing some studying and seeing what was available locally, I ended up feeding some of the following:
The wet foods were noticeably different. I really liked Merrick's - so did she
I've fed others as well (Evanger's, Felidae), after reading the labels. That being said, I only used a small amount to dress up the dry.
Basically, I tried to go for the better protein sources, staying away from corn and most other grains (sometimes feed rice), and shyed away from "meal". www.naturapet.com
has a pet food comparison program - it's worth playing with.