*8-16ga for speaker*1/0ga for amp
*Get a 1/0 to 4ga reducer for your ground and positive amp-side terminals
*Decent RCA's (no Scosche or Hugfen shit)
*Use whatever is easy to work with for remote
*Do the Big 3 mod if you haven't already, use at least 1/0ga
*And remember...just because it SAYS 16ga (or 12ga, 10ga, etc.) doesn't mean it is. Just because wire A is thicker than wire B doesn't mean the wire is a larger gauge. Pay close attention to the ratio of the exterior rubber/plastic composite to the wire thickness.
If that doesn't answer all your wiring questions, then you're fucked //content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif