I have a Alpine 7894 with two JL 8 subs behind the seat. I have a lot of the car dynamated. I was wondering what a good set of speakers would be for the doors and behind the seats? I will only be using the amp built into the Alpine 7894. I also want to keep my costs down. I have spent too much already and still have an alarm and other things I need to do. Any suggestions? Something that sounds good but wont cost an arm and a leg.