Stereo install

Help an old guy figure out what you're doin. Are you planning on reinstalling the back seat or just going to leave it down all the time? I have heard of subs firing through a back seat, but never 6x9s?

My current interior project started out as a quest to put a stereo in. So far I've replaced a floor pan, rust proofed the floor, put down sound deadener, recovered the seats (converted to buckets), mini-tubbed the rear (while the interior was out) and laid new carpet. And still don't have a head unit in it!!!

I put Boston Acoustics in the package tray and a buddy is glassing some 6 1/2 BAs in the kick panels, and I have 2 3 1/2s for the dash speaker area. Still need to pick an amp and head unit.