Xanavi systems and COMAND systems are ranked the best by technophiles. If you are buying a HP car for its nav system, then you should have bought a MB.
As far as residual value, I suggest you look up KBB’s latest forecast stats on ‘08s. You won’t find American cars [except the Corvette] making the list and they haven’t for quite some time.
I’m glad you like your car. One should be happy with their purchase. Detroit has lagged too long behind the imports and once again, we see them playing catch up. All well and good for the die hard American consumer. I don’t know how many HP cars you’ve owned over your lifetime but you sure are naive. Good luck. Hope your electrical system holds up. Heh. ;-D