Who is (are) the Brooks Brothers of France?

Hello -- we're moving to Paris next month, expect to be there for a few years. I'll be needing some somewhat conservative dress clothes at some point -- I understand that while few men wear ties many wear suits to work.

So...are there any stores/chains that are the equivalent of Brooks Brothers, as far as price/quality/design? High fashion aside, I know nothing about French mainstream men's clothes.

Thanks