Saab navigation problems

I don’t own a car with satnav. I live in a small city on an island and I own a street directory, so I’m ok. I’ve had the satnav discussion here before and now, after much deliberation and contemplation I’m quite set on the idea that factory satnav vs aftermarket satnav is a total no-brainer.
Aftermarket wins every time. It’s waaaaaaay less expensive, is easier to upgrade, and you can take it from car to car as you change your ride. Makes total sense.
If you’ve chosen integrated satnav then you’ve got the bonus of having it look very nice and blended with your interior. But the cost is rather prohibitive and it’s not just the cost of purchasing it, as Joe M let me know via email:
This is more than slightly annoying. I paid an additional $2,795 for my Saab’s navigation system (’07 9-5 Aero SportCombi) pushing the MSRP to almost $45K. This is one of GM’s highest priced passenger cars and by far the most expensive of all the navigation systems that GM offer (it’s the same exact Denso-sourced unit found in the Corvette, Cadillac STS, and the Cadillac XLR). The ’06 – ’08 9-3s and 9-7s share the same Delphi unit with one another and almost all other GM units.
For some reason, ALL run-of-the-mill Chevy, Buick, GMC, Cadillac, Corvette et al driver gets two free disks, one on their first anniversary of ownership, the second disk on their second anniversary. Saab is not included in this complimentary upgrade program even though the ’06-’08 units are the EXACT same GM units, utilizing the exact same discs found in their lesser GM siblings’ dashes.
Is their any way to get GM to explain their alienation of some of their most discerning customers? Why do we have to shell out $200 per disc? Here are the FAQs:
Here’s the part number they want me to shell out $199.00 when my STS, Corvette, GP counterparts receive it free of charge in the mail. Click to enlarge.

Like I said, this whole things seems to need directions of its own.
I know some people like the integrated thing and I can see why. It’s not as practical but it is a touch more premium.
If my dealer were throwing in a Navman I’d be quite happy to spend my several-thousand-dollars on some other optioins. Everybody wins and I still get to find my way home.