That is the question! LOL You stick around here and you will see everyone has thier own opinion and great reasons for feeding the food they do. However, we just agree to disagree on some points. LOL We can do that here.
Britster has given you a great website many here refer to. Ultimately, you have to feed the food that works for you and your guy, reguarless of the stars.
Another great resource to check out is
http://www.orijen.ca/orijen/ORIJEN_White_paper.pdf
also,
The Dog Food Project - How does your Dog Food Brand compare?
As for your question, I feed Taste of the Wild. There are some on here that do not like this food, but it is the ONLY thing Maddie will eat. I tried her on many 'top foods' and she lost almsot 4 lbs!!! She would not eat, became fatigue. I started her back on TOTW, she is back to her ole, playful 13 pounds!!
She LOVED Royal Canine but started getting itchy on it so I switched her off it. If she didn't have a problem with it we would be feeding it.
Good Luck!