As an audio enthusiast, more than a car enthusiast, I can tell you that bluethooth ipod audi integration is just poor sound. The technology is too new and to mate that with the Lexicon sound system is a crime. Even using an iPod with low bit rate of downloaded songs can be easily distinguished from a low quality CD, that has over three times the bit range versus Apple Lossless downloads. You can even tell the difference with the Lexicon on poorly recorded CD's versus higher recording standard artist CD's (James Taylor, Michael McDonald, SLASH, etc). This is one feature I surely would not wait for. As far a the navigation screen, I have had several, and quite frankly, one much bigger gets to be a distraction from the road. I often hit my volume control in for a few seconds to make it go black. That's a personal decision, but I would not wait and pay 5K more for wireless iPod connection that gives you inferior music. I would be inclined to wait until the 2013 comes out to purchase your 2012 though. The price will come down further and you can compare yourself. Bring your Ipod, and buy some high end recorded CD's.
At this point, wires have not been surpassed in audio (expensive wires are snake oil, I just mean having a wired connection). I have about as much invested in audio systems as my Genesis, and been a hobby of mine since high school (mid fifties now). The Harmon Kardon sound system along with the quiet ride of the Genesis is the finest OEM sound system I have ever heard to date, but sending shaved ipod music wirelessly will ruin what you are buying. Harmon, who has purchased about every audio company they can over the years, owns Lexicon, as they own Mark Levison, the other highest end price points of their brands, which include JBL, Infinity, AKG and yes, even Clarion (who I think has been put to rest).