I felt like I needed a bass too because the Roland GR-20 doesn't work well, didn't want to do a whole lot of preset diddling etc. I don't have the hands for a real bass so I got this:
Kala U-Bass solid body. I got turned onto it after seeing Steve Vai's bassist Phillip Bynoe using one on several tunes live. Powerful sound from a wee thing. I like small guitars and basses.