Suggestions for Upgrading Nav.System in 2001 M5

The navigation system dics reader on my 01' M5 recently died on me. My dealer was clueless other than to offer me a $1350.00 replacement. I had several electronics shops tell me the same. My dillema is the system (Phillips) is a bit outdated ( entering a location can be quite time consuming) and there are much better, more updated systems out today that cost about the same. Pioneer's touch screen model is a killer in comparison. The rub is, of course, I would loose all the functionality of my TV/DVD/Navigation/M-Sound Stereo combined with all the car's computer output, if I choose to go with an updated stand alone system. Not to mention the issue that there really isn't any space to accomodate another unit with a seprate touch screen in the M5 dash/console. Has anyone had any experience in upgrading the navigation system in an 2001 M5? Is there a chance that the latest (2004) BMW factory installed navigation system would be compatiable with an 01 M5? Any suggestions?

that nav system that is in your car will need to be replaced to make the preexsisting screen work and after market will work but when installing make sure not to use the I-bus wire for power for it this will cause major problem with the rest of the car.teh wire is white and grey with a yelow tracer. the updated version from the dealer should be a dvd system and you will nolonger need different discs for different parts of the country if you dont have this allready.

The only update I got was a CD, that cost around $200, no new machinery