if i were you i would ditch the pioneer p682s and just go with the 6865s in all four doors. i think you will like the way they work with your hu better. this is pretty much what i have but i have the older hu, the p4000. i have had the hu and the speakers for 2-3 years now and they have been great. for the subs and amp i would have to say no to the pioneer subs and the infinity amp. infinity amps well they kind of suck. in your price range you could probably find some good mtx or rockfos subs, and go with maybe a us acoustics or maybe even a profile amp if you want alot of bang for not much buck. thats just me speaking from experience with pioneer and such
matt
