Thanks for all the info. I was encouraged after your first response - I'm a bit nervous after the second. Not sure how I feel about removing the cluster and tapping the wires.

As warned, a few more questions.

Are you planning on doing anything with your MID? I've read that some people try to re-locate it to retain control over functions like setting the clock, trip settings, etc. Not sure this is a big deal to me, but I'm not sure I like the idea of not being able to set the clock, mpg, etc.

What about steering wheel controls? Do you know how involved the interface install is?

If I go with the Z1, I'll likely use this bezel http://www.mybimmer.net/x5doubledintrim.htm I'm not clear how the Z1 and or the bezel are secured inside the new opening.

Thanks again,

Mike