So, found the PAC FD31 a bit cheaper (under $400) and figured, why not give it a go as I've used their products in several other vehicles...latest being a Jeep GC SRT w/factory head unit. I feel that if it works fine, since pretty much plug-&-play, this will be a good starting point and save over the $400 Zen NAVTV module. If you've used, please chime in. Right now, I plan on boosting the power to the factory speakers to increase the volume, knowing that I'm also adding aftermarket subs (10" under back seat). So, current plans are to power all factory speakers with my JL XD600.6 for front stage and rear doors (may add the JL TwK DSP in for good measure and even more tweaking), all utilizing factory ran speaker wire, Dynamat all (4) doors and using my JL600.1 for my subs. Beautiful thing about boosting the speaker power over the factory B&O, is that the bass will be tuned down on the front stage (and rear), so if done right, should improve and not damage the speakers...although, again, this is just the starting point. I do intend to run new speaker wire and replace factory speakers in the future - when this is not enough Should be straight forward w/o hacking any wires...stay tuned!