As far as brand not sure right now, but i got a buddy that owns a towing company and all the cars that get signed over to them,the system is considered apart of the car so they have alot of shit out of vehicles. Ima hit him up and see what decks he has laying around, thats no prob there.
As far as upgrading the system i wont be for this truck. So i think 8 gauge might work. But you said its good for running as much as 340 watts RMS. It cant run anymore than that? Or am i not understanding what are you sayin there.
So far this is what i have in mind so far, lmk what you think-
Kicker 10'' CompVT 07CVT104
http://www.sonicelectronix.com/item_8582_K...T+07CVT104.html
OR
10'' Kicker 07TCVT102 w/ box
http://www.sonicelectronix.com/item_8750_K...+07TCVT102.html
Crunch Amp GPV 1000.4 (GPV1000.4)
http://www.sonicelectronix.com/item_17500_...GPV1000.4-.html
-Decent Speakers (new or used)
-Ill either make my own box or have the my local shop fab one up.
-Ill get a decent battery.
-Big Three
-All the wiring