HI all - I'm a guitarist most of the time, but have been playing some bass in my garage band and want to buy one. We play mostly rock/blues - Allman Bros, Clapton, Grateful Dead, Stones, Van Morrison, etc - and i like the bass line to be audible and "active/improvisational" vs just in the background. Recommendations for bass and/or amp? I don't mind spending some $$ (but like to keep bass under $500 - and i plan to buy used). Thanks for any ideas! I will be going out to try a bunch but any suggestions to help narrow down the universe would be great.