My truck is old, and I still have a 40W CD player running straight to some 6x9's. I'm thinking of upgrading the deck first, then the speaker system. Would you guys reccommend an MP3 Player, or a deck that play's MP3 CD's? I don't really want to spend that much money if I can help it. Also, I have room for 10's in the back, but it is kind of a small truck (94' Toyota Pickup, no kingcab). Would it work ok if I just bought a small amp and stuck a couple of 10's in there? Any advice would be appreciated, thanks.