Nutro vs. Blue Buffalo?

I am having a horrible time trying to figure out what to feed my cats! My vet pushes Hills Science diet so clearly she is not that much help...

Right now my 1 year old cat Luna is eating Nature's recipe grain-free wet food which she loves. I have never heard much about this brand though but figure it must be better than the garbage ones since chicken is the first ingredient?

My other cat, 3 year old Salem has some trouble eating it because it isn't minced. He loved both Nutro natural and Blue Diamond (spa select) when I tried those but after doing some research, I've heard horror stories. Every review seems to be negative on both yet on these forums a lot of people say to feed that. Which one should I choose? I've been feeding him different foods every few days and I know this isn't good for him (though he never seems to have an issue).

Anyone with some advice? Desperate!

I believe the majority of the complaints about Blue Buffalo come from DRY food, not the canned food you are feeding.

My general rule when picking out canned food...
Named meat source #1 ingredient.
Look to see what other "fillers" are used. (Other meats, a vegetable, a grain, etc...) Some are better than others.

I personally only use Grain-Free foods. I'm ok if there is a small amount of vegetable in the food. Others on here are not. I'm limited to what I can feed as I have several cats with food allergies. Personally I use Natural Balance, Instinct/Cat's Pride and Merrick (with the occasional Wellness CORE or Simply Nourish.)

I have used Natural Choice before and the cats that could eat it, like it and tolerated it just fine. I have not used any Blue Buffalo canned foods.

Congratulations for wanting to research the issue of nutrition on your own, and not following blindly what your vet recommends/sells.
NutroNatural is a decent brand. And CatPack has a point, the ingredients are listed in order of amount, so if rice, meal is the first ingredient, you know to avoid it.
While not all dry foods are created lousy/equal, I believe wet food is much much much (did I mention 'much') better for cats than dry food.
Do look at 'grain free' foods, but also read the ingredients: peas are not grains, but are carbohydrates, which cats don't need. AND some cats are allergic to peas.
Here is an article about nutrition and cats and a http://www.thecatsite.com/t/248813/so-what-is-the-best-cat-wet-foodabout the best wet food (In people's opinions).
I fed raw, but when I was feeding wet (and before Ritz became addicted to Fancy Feast Classic Seafood), Ritz liked Soulistic. I believe it is PetCo's brand, but it is fairly high in carbohydrates. (Tapioca is a carbohydrate, though not a grain. See why you gotta read the lables

Feeding different wet foods is not a bad thing. Switching dry foods is when you have stomach issues. It is a good idea to rotate brands and flavors to help prevent allergies from forming, picky eating if a brand or flavor should be discontinued or recalled, etc. Also, different foods provide different nutritional profiles which is good to round out the diet.

As for which foods to feed, that's always a tough question. A species-appropriate food should be high in animal protein, moderate in fat, very low in carbs. www.catinfo.org is a site written by a vet that explains why species-appropriate food is so important. It also has a very handy comparison chart of wet foods commonly available in the US.