My guess is you will be paying for the "newness" of the Nav system in a GP. I am not big on them but I do not travel much out of the realm of

--where I know where I am either.--

A Nav system wuold be great for unknown areas. They are still a bit buggy but even when you miss a turn they tell you to turn around....better than reading a map IMHO.

And with that option that would put your Comp-G around $35K right?

Here is my opinion (now that I rambled on for 5 minutes) If you can afford it -- GET IT!

Better to have it and not need it -- Than to need it and not have it

Now $2300 for the Nav system -- is it the amplified Monsoon system or the regular system? In the Vibe with the Nav system you lose the high watt amp.