I've decided I'm going to buy a Fender Jazz bass to compliment my Fender P, which I currently have strung with roundwounds. I was thinking that, when I get the Jazz, would it be a good idea to put flats on the P, and rounds on the J? I'm looking for as much versatility as possible, and I want one bass that "lays down" in the mix, and one that punches through it, depending on the songs I'm playing. From what I can tell from having played some Jazz basses, they seem to naturally cut through much better than my P does, anyway, so would doing this just further widen that gap? I've never played with flats before, so I'm somewhat unfamiliar with how they'll affect the overall tone. Or maybe my thinking is backwards, and the J should have flats? Let me know what you think.