Yah, there are alot of twisted options that affect the overall packages..... such as w/nav you can not have the subwoofer or the manual trans... Nevertheless I had to go to the dealer and special order the car, and talk though the actual packages and options..... like getting the block heater, and sence I live in the desert, the dealer was lost.
The XM and NAV antenna is a moster block in the front window, top passanger side, which if they told me might have turned me off.... but yah I know what your talking about the online sites.