I have a V1 but when I get my E90 M3 delivered I was considering getting a Passport 9500ci installed (link below). What are others experience with custom-installed solutions?
The obvious benefits to me seem to be concealment and no windshield in the way to hinder performance. Cost and portability are obvious negatives.
2009 E90 M3 - Silverstone/Fox Red - M-DCT, CW, PP, TP, 19", Moonroof, Sunshades, PDC, Enhanced Prem Sound, HD Radio, Sat, iPod, Smartphone Integration