I have a Fender 50's Reissue P-Bass. It was modified before I got it. It's got a Basslines pickup that has more bass and treble, but less midrange than normal P-Basses have (very smooth tone). It also has a BadAss II bridge and straplocks. Hence the reason I got it. When I turn the tone knob more than 5% on, it looses all midrange expect some really high-mids, gets really trebly, and looses significant bass as well. A lot of clang and finger noise, but not much useable tone other than for slap which it's quite good at. What I'm looking for is some strings with a lot of midrange to them. I would consider groundwounds or flatwounds. I would like to have a very growly, but not trebly tone. A lot of The Meters tunes would give you an idea of what I'm looking for. I mostly use the bass for Motown, Classic Rock, and old-school funk. I can deal with loosing good slap tone, because I will be buying a Jazz bass for that in the future. Any suggestions?