Youd dont have to get an after market deck to put an amp and sub its just a lil deal that cost about 20 bucks and hooks up to the back of the stock radio! I got a real good deal on my system at bestbuy but thats cause my girlfriend works there. I went all alpine cause its the best! I did alpine head unit and s series on all 6 speakers cause i need to track down the tweeters in alpine! The 10' type R with a alpine mp 850 amp and i broke the sub in slow and now i have all 800 watts the the 10 and it pounds nice!