Ok my suggestion would be, try to stretch to $1500. Buy all last years stock, nothing wrong with it, still works, ex-demo stuff is alright a lot of the time also.
I did this $1300 head unit got it for $500, MB Quart front splits $200, and then amp $250. Im still saving for the sub, as the car isnt here yet, so I cant really get one just as yet. But its TOP of the line stuff, and low midrange price.