I have a Line 6 Bass Pod XT Live which I find works really well for, errm, Live stuff. We too cover various styles and the Pod helps me get something approaching the right sound. My core sound is flat; no amp models, no cab models, no EQ, no FX. I use this as a basis for everything else and add models or FX as required. For example, my patch for old skool soul/Motown uses a B15 fliptop model, and yes I know the Line 6 models are never going to be as good as the real thing, but it does a good enough impression of that Jamerson sound. Which is great because it means the only changes I have to do on the bass itself is pickup selection -- I don't have to guff about with tone controls. The same goes for my 'rock' sounds (Sunn & SVT models) and the other various tones I use. It's probably not a perfect solution, but it works an absolute treat for me and I am very chuffed with it.