Best sites for this stuff, IMO:
www.digitalww.com www.dscustoms.com
I would look into getting either an entire computer setup to go with your sound (By far coolest..) and a touchscreen LCD to go in the 1DIN slot (
www.digitalww.com has a few) OR custom mount an LCD in that place in front of your shifter.. That is where I am putting my LCD in my Jetta.
Also, if you do computer, make sure to use a VGA LCD, so you can SEE the **** on the screen
BTW, I like your sound system
What type of amps are you running?