In an article I read a while back, Dorian Yates claimed to have never done a wide grip anything for back in his entire career as an Olympia champion and he's considered to have one of the most impressive backs ever in BB history so take that bit of info for what it's worth. He said that the wider grip compromised the biceps and since the bicep was the weak link in the equation it would be better to put them in a possition where they can be stronger and therefore pull more weight.
If a stronger, bigger, and thicker back is what you are looking for, then heavy assed deadlifts and heavy assed bent over rows is the way to go. As soon as I decided to fully embrace those exercises and do the bent over rows like Dorian Yates says to do them (at a 70 degree angle, not fully bent over like the tradional movement is done), my back started to grow and with that my strength in all other lifts including bench and squats started growing stronger as well.