Having just adopted two new kittens, this is a subject I've also been exploring. During my adoption interview, I was told the same stuff about dry food and what types of canned food are best. I was given a brochure of info from Lisa A. Pierson, DVM and found her to be very convincing.

Innova was highly recommended by the Animal Welfare League that was fostering my cats, but it's been hard to find. I've ended up going with the Wellness brand, which was also recommended and is sold at Whole Foods and some other pet shops near me (though not at PetSmart or Petco). Alec and Olive seem to really enjoy it, but they have both been a bit gassy. Dunno if that's the food or just a typical kitten thing, though. Been a loooong time since I've raised a kitten