Does anybody know the model the "new" (DVD-based) navigation radio option is for '05 as of Jan '05? I understand the crappy RB-4 I got duped to the tune of $700-800 bucks OVER the Infinity radio option is NLA. Is this the not-quite-as-crappy (but much more expensive) RB-1 or did DC breakdown and put the wonderful (but huge) DVD NAV/MP-3/Internal 6-disk CD changer radio from the '05 G. Cherokee/Chrysler Pacifica et al. Any info would be helpful... the local dealer is clueless.