I have a P bass (Lakland Glaub with Fralin pickups) that I'm really enjoying. I will eventually put flats on it, but as it's my only bass right now, I want to find the perfect roundwounds for it. Currently, I have a set of DR Lo-riders (hex core, nickel), which I find still a bit floppy even with the hex core. Also, I find them (as with many rounds) to lack a bit in the upper mid-range - especially noticeable on the D and G string. I'm EQ-ing a bit of 800 Hz in to get closer to what I want. I think part of the issue is the P design and the relative newness of the strings, but I keep thinking there may strings that will fit better. Any thoughts on what roundwound string will get me both more stiffness and more rounded upper mids?