Great questions - thanks.
I don't want to spend a ton, so I really want to stay under $200 (as far as possible) - but obviously, I don't want trash.
None of the vehicles have any upgrades. I'd love to learn some specifics about how to go about this, as well.
As far as listening goals go, I have outgrown the BIG BASS phase (meaning I've gotten old) but I would love to have some bass to augment the (basically) stock Bose systems. There are times I like to listen to my music loud, though, and I'd like to be able to comfortably outperform my comfortable listening levels. I listen to damn near everything besides country. Old school hip hop and R&B, mostly - but I also enjoy some sessions of classic rock.
I have better nunchuck and bo-staff skills than woodworking skills. But I'm not completely helpless on a saw.
Thanks again for the questions and answers.