I will respond once again on this subject and also provide the link to my earlier comments. Depending on the model iPhone that will effect your decision. I chose the iSimple solution back in 2011 when the aftermarket technologies started making inroads into the "Auto Infotainment" segment. Not much has become available for the iPhone 5 but its on the way -- many iPhone 5 solutions tend to be somewhat problematic with connectivity issues due to the new "lightening port" and hardware/firmware incompatibilities. The TranzIt IS77 with the prior iPhone models does not suffer from this and also charges as well as affords an AUX connector -- for other players or use via the iPhone earphone jack. There is also the RDS USB solution by Audiovox and the Sony XDP-MU110 one that I will be upgrading to sometime this summer -- even though I have been quite pleased with my iSimple solution (XDP-MU110 not only affords a 100% digital solution but a 45W x 4 (17W RMS) amplifier). Good luck with your decision.
Audiovox - Driven by DICE Electronics - Universal RDS USB
Originally develop by: http://www.oemautosound.com/p-665-fm...ce-sirius.aspx
Sony eSupport - XDP-MU110 - Support