It looks like you guys know what your talking about here. I have a 2005 X5 4.8 w navi and DSP and before I bought it someone had put aftermarket speakers,crossovers.etc into it. When I bought it they removed all that stuff and put crappy speakers back in and didnt even hook up some speakers. I am in the dilemma of either bringing it back to stock or upgrading. What do you suggest?? I need to keep the cost down also. Can I install XM and an Ipod adapter? Can I install a dvd player/tv to the navi screen?

Thanks

BB