I'm not to familiar with mo town records, but I imagine some if not a lot of the tracks feature fretless on them, so getting a fretless would nail some of those tracks better.
I got one for fun and playing a couple of slower tracks my zeppelin band does and it adds a new dimension to my playing and it will probably do the same for you. You approach things differently, at least I do.
Proudly using Musicman basses, vintage ibanez copies, and custom builds.
Amps: Ampeg b15n + Acoustic 370
Cabs: mesa 1000 + Ampeg Heritage 410
I stomp on EBS, EHX, and MXR pedals.