here are some of the best systems available imo...


viewed thru upgraded lcd radio screen:

http://www.rearviewsystems.com/coflmocajare.html


lcd built into the rear view mirror:

http://www.rearviewsystems.com/remiwin4lcdc.html


here are some more options...including a system built into a license plate frame, etc:

http://www.sportsimportsltd.com/revimocabavi.html