alright i got my system all done now im just saving up for a good headunit. im willing to spend up to around $900 i would like to spend a lot less though. im looking for something that can play burnt dvd's, cd's mp3s and has a navigation system. also id like one that shows the interiors of the car. my friend has one that shows the rpm's battery so on. any ideas i have one that ive been looking at but need a bit more guidence this is a new area for me.