You should worry about who's going to run you enough beyond the near future. July will come and go before you know it. Some companies will do well over the summer, but tank in the winter... others are pretty stable all year around.
If you're running single, you'd be better off asking which company will keep you busy on a consistant basis. Teams will do well almost anywhere. But singles are better off with a smaller company. I hear A.Blair is running the snot out of their single drivers enough that they make $2000/wk. Check em out... if they do, I'd like to hear it from a neutral source, other than their recruiter (or whatever corporate sounding title they came up with). ;-)