I just went to an installer to get my brand new empeg installed into a 2001 3-series, and they told me that the only way to do the install would be re-wiriing all the speaker wires ( They said that BMW uses a single ground wire to connect all the speakers, and that a head-unit such as the empeg would need to have the speakers re-wired in order for it to run.) Furthermore they said that the empeg would have to be custom installed due to the fact that it's a pull out unit and the way that the BMW kit works is to secure the head-unit around the outside trim thus preventing it from being removed. Also they quoted me a price of nearly $350 for the install.
I love my baby, but I unfortunately am not technically inclined when it comes to car stereo installs. If someone with more technical know-how could help guide me in the right direction about whether or not all these steps are really neccessary to install the empeg, and also if $350 is a reasonable price to pay I would be very grateful.

Cheers

Collin