This is the sound system I am currently thinking of installing in my new xB:

Boston Acoustics G2 Sub
Rockford Fosgate (punch) P300-1
Rockford Fosgate (punch) P400-4
Custom Sub Box
Boston Acoustics SX60 Speakers, tweeters (front)
Boston Acoustics SX65 Speakers (rear)
4 gauage wire all around
Sound deadening in doors

Thought and opinions on this??? Like, dislikes?

You know of course there may be some space under the backseat for sound components. I found this by accident the other day.

right i saw that... perhaps the amps?

nice equipment, haven't heard any boston stuff since my old pro series 6.2's were the top of the line

Under the rear seat plenty of room and easy to remove. I just deadened my floor, it is not that hard and I recommend