I am a car audio guy who likes to have a nice sounding system in my vehicles, but my GN is going to be a bitch....I don't know a lot of companies who manufactures 4"x10" speakers, and they really don't sound that great in the first place, but I was wondering if anybody has put a different size in the rear deck to replace the 4x10's....I was thinking maybe 4x6's or even 4's, but I dunno....any help would be greatly appreciated!