Men's Wearhouse is pretty good - that's where my husband shops for his work clothes. However, be prepared to spend... they (at least our local store) have very good salesmen. You'll walk in looking for a pair of pants and walk out with a suit, sport coat, shirts, ties, socks, and shoes as well
I think my husband spends more on clothes than I do!!
Brooks Brothers is very good for women's clothes. I don't know much about their men's line, but they started out as a men's clothier, so it's got to be at least as good as the women's.