I worked as a nutrition consulatant and was not paid by any dog food companies. The foods I had the best results with were (in no particular order) Wellness Core, Ziwi Peak, Orijen, Timberwolf and my FAVORITE is The Honest Kitchen.
Organic, Holistic Pet Food, Premium Pet Food - The Honest Kitchen
I think you will like Honest Kitchen because you can add fresh meats if you desire to mix things up, but on its own it is balanced.
as other's have said, there are so many different opinions - I would start with those listed on this thread and do your own research.
Good luck!!!
And good for you for not feeding Nutro!!!