Download Yellow Tools Independence free. It's a big download, but the basses are incredible and include a nice collection of slides as well as an amp modeling effect. Below is a clip I made using it.
Interesting you mention that. I downloaded that 2 days ago, but never got to installing everything. Yeah, I tried the bass last night, excellent . I think I'd eventually get an electric bass...the bigger problem is piano (I don't have the space or $), but there are plenty of very inexpensive options for piano.
Thanks for the sample so I could hear how it sits in a mix.