Thinking about buying these to replace my bose system.
Bad idea? Good idea? I like playing my music loud with a good amount of base but don't want to spend too much money.

this is the setup I was thinking of (I am a total noob so tell me if this won't work)

Polk Audio MMC6500 front and rear doors
Kicker RMB8 sub in the stock subs place
Some kind of amp (if someone could recommend one it would be cool)

 

BTW how much would it cost to sound deaden all 4 of my doors?
How many square feet are we talking about here?
and I drive a 99 TL