Department Store Credit Cards Open one/Close another?

I currently have 3 department store credit cards (ATL, Kohl's and Bergners). I want to open another credit card for the The Limited Express b/c I've been shopping a lot there for work cloths, they have free hemming, free shipping, and great coupons if you charge. I was thinking if I close my ATL and open the limited card that it wouldn't hurt my credit as much? Would I bet better off having 4 credit cards from department stores or closing my ATL before I open the Limited (or maybe I should close my ATL after?). I have a high FICO score and pay off my debt monthly. Any ideas how to best proceed? Thanks.