If you want a bit more clarity (than standard flats), with some serious bite and subtle harmonic overtones, you would love the Cobalts. I have then on 5 of my 6 basses and #6 will be wearing them soon. Give them a try. I think you'll be very satisfied.
a GC close to me has some 2813 sets.
bit of a drive, but from reading this thread, this may be the final solution for my fretless.
and possibly my fretted jazz basses as well.
