If so, do you have pictures and/or a description of the GPS antenna used (what make/model NAV setup) and where the antenna was mounted??

I see these new Honda Accords and Acura's with these monstrous "fins" on thir roofs near the rear winshield. I hope this is not aftermarket NAV. Someone told me it was for XM/Sirius Radio. Can these aftermarket GPS antennas be mounted in a conspicuous place such as in the hatch hidden somewhere or must there be a direct "line of sight" from the antenna to the sky/satellite dish orbiting the Earth?? Thanks for your help everyone!!

I'm also considering the Pioneer AVIC-N1 to replace my double DIN OEM 6 CD changer head unit but also not sure what should go in the bottom DIN?? Another storage compartment, NO!! What do you guys reccomend?? Peace all...