I am expecting twin boys this fall and am wondering what the best moderately priced diaper bag would be? Ideally, I'd like something that's not too girly, and that my husband would also feel comfortable carrying. Also, I hope to continue doing lots of walking after the babies are born, but am not sure how much stroller storage I'll have to work with, so a comfortable bag would be best (I'm 5'4", busty and usually small/med sized--but not anymore!).