I have a Pioneer AVHP4300DVD already wired to a relay for remote amp turn-on and wired for AWSC steering wheel interface. $290 shipped.
I also have a Sound-off Audio 10in sub box that i had an IMage Dynamics sub in. The box is BARE. 80 bux shipped. Feel free to ask any questions.
I had it installed behind rear seats in a 2011 Tacoma Double-Cab. It is carpeted. Will attach pic of the box asap