Hey guys, when it comes to stereo stuff, I only know the basics; how to hook stuff up and install, but have no idea what sounds good, what's the latest stuff, etc etc.

I know I want this box:
http://www.topedgeonline.com/Chevy_A...07aval215p.htm
I'm not into heavy bass, or tons of it, but i do like a clear, crisp bass sound, nothing thunderous. I don't listen to the radio extremely loud and don't like a lot of bass when the radio is at normal volume, however, I do get spunky once in a while and like to crank it up.
(mids and hi's coming later).
So for now , I just wanna know which set of subs will sound better.
15's, 12's, 10's.
And which set will grow with the system in the future.

I'm leaning towards the 10's because they seem to recover quicker, have a tighter bass sound, give a good thump, but not a long shaky bass sound.

Also, if this box is better, or you see a better box, that goes in the same location, please comment and suggest.
Here's another one I like:
http://www.topedgeonline.com/Chevy_A...avalpolspl.htm


here's a list of all boxes:
http://www.topedgeonline.com/Avalanc...show=10&page=2


thanks,
allen