I know i posted this in the sub section but i thought i could reach more people if i went to both sections. Ok, this dude i know wants a complete system. he is willing to spend like 5 to 7 thousand dollars. He is getting an avalanche and he mention putting the box partly in the bed since the back folds down or sumthin, iono. But anyway, any suggestions on subs, amps, alts, batteries, dynamat,wires, HU, box, and anything u can think of that he would need would be awsome. He is open to anything and wants to go all out. Im not sure if he wants SPL or SQ but a good blend would prolly do good. Thanks for any input.