Which nav to go with?

[kodiakz]

Much better mapping and sound quality. The 6600 also has a better ipod interface than does the Z1. Don't get me wrong, the Z1 is a good piece that will probably be outstanding when it becomes the Z2 and they iron out all the bugs--but in the mean time, all those bugs drive me up a frickin wall daily!!! If you would actually use the HDD, than the Z1 might be the choice. Keep in mind, however, that you can't rip anything to the drive except for regular cd's and have little control over the playlists The 6600 currently supports only sirius, but I hear that xm is coming shortly for Eclipse units.