About to purchase my soundsystem... any questions?

I already have the ones with the ** in front, i have to buy the others with this kids discount at bestbuy. Is there anything i should know or anything you may think it better for me to get than whats listed below, lemme know. I plan to dyno-mat everything. I have mono so i can't install it myself even if i knew how, i know just installation alone is gonna set me back a pretty penney. I'm getting a discount on the other stuff so it shoudln't be too pricey.

Pioneer DEH P8400M

R&T Enterprises 12" Dual Sub Band Pass Box

2 Rockford Fosgate 12" Punch HE Subs 400watt max each

Rockford Fosgate 2 channel 350watt*2 amp

**Pioneer 3 ways for the back

**Pioneer 2 ways for the front

**Lanzar motorized in-dash 6.4" screen w/tuner & dvd player

**PS2