I'm not sure how old you are or what your price point is. Or what type of corporate job you're talking about. I wouldn't go too "girly" if you're in a businss environment, unless you're in an arts organization. I think Lepore would work nicely in the arts or non-profit. I wouldn't wear it in finance or legal. Take a look at Escada. They make good quality, flattering clothes that are will make you look serious. Theory is good too--and less expensive--particularly if you're on the younger side. A lot of younger corporate women seem to wear Theory.
theory makes the best suits for my petite frame. their pants fit like a glove!