pick up an IASCA CD, also may as well pick up the Chesky Ultimate Demonstration Disc. Listen to them both on headphones 1st to get an idea on tonality. I think You said you had some good seinhessiers .
Outside of that, its just finding music you enjoy listening to, that is recorded well, and putting a CD together.
I highly advise that when you start going to more shows (its inevitable) that you have your own cds so you can listen to what you know. Anyone can make their car sound good with their own stuff
I listen to alot of country now, which is actually still recorded really well for many major artists. So I use alot or Brad Paisley songs. I grew up with him so I know what his voice should sound like.
after that I have a wide range of stuff from Sarah Brightman to Eminem to hatebreed
also check out foambymail.com
usually the cheapest place to get materials. they have volara foam, which is same as ensolite. they also have neoprene.