Re: recommend a bass
Try the basses made by Dean, particularly the Edge Q5. Being a 5 string makes it more versatile, it has some EXCELLENT tone as standard (I DI'd one into a track and got nothing but praise for the bass tone), and, the crux for me, its a 35" scale bass, which means it has a much more taught, piano-like tone to it, and none of that annoying flubbiness in the low B.
Its even a nice bass for my admittedly limited slap technique. The only reason I wouldn't buy one would be if you were adamantly against getting a 5 string.