How to choose the best food for a diabetic dog?

Trying to figure out the best food for a diabetic dog on the internet is like trying to find your husband at the mall on the Saturday before Christmas - nearly impossible.

I think we have it narrowed down to a high protein, low carb, moderate fat diet - but that only narrows it from infinity types of dog food to hundreds (that may be a slight over-exaggeration). I found a pretty good article about this type of diet and diabetes here: http://www.ncbi.nlm.nih.gov/pubmed/15023591?dopt=Abstract. My vet said this diet isn't ideal for an older dog, but since (we think) that Buzz is still pretty young, I think he will do well on it. The only problem is that we can't get it started until after the holidays. He's going to stay on the Iams Low-Res wet food through New Years (with boiled chicken of course!) and hopefully once we get him switched to a diabetic dog food, the diabetes will be more controlled.

I'm about to head to my vet to pick up some more wet food (Buzz is eating more than a can a day now!) and to order one of the high protein diets in a prescription diet. Can you believe that there are no other diabetic dogs at my vet? They have to special order Buzz's food now, but it's okay because they have to do the same for Bella so it won't be too much of a hassle for us to call in when their food is running low.

If you have a diabetic dog - what type of food do you feed them?