Mark,

Glad to help with any question you might have.

There's quite a few sites out there, but here's a few that I found helpful were:

bcae1.com, caraudiohelp.com, the12volt.com

The high-end (mids/tweets) is a slam dunk as far as keeping the look stock. But the sub(s) w/ amp(s) might be more of a challenge depending on what you're looking for. Although, there's a lot to be said for the whole 'less is more' point of view...

Some questions to ponder:

You looking for just 'some' bass to compliment the high end?
Or would you like a little more muscle in the sub area?
Will you be playing this at loud volumes for long periods of time?
What's your budget? - any favorite brands?
Do you want the system to be expandable? Or is this a one shot deal?

Anyhow - hit me back.

-biju.