I got the OEM navi and have not regret it one bit. The biggest plus to me is the in dash integration. I don't have to have visibility impaired with an portable on my dash or window. Also there is nothing portable that compares as far as screen size...
As far as it being worth $2000... If you pay sticker with no discount than the unit is $2000. If you pay less than sticker than you can say the OEM navi is free. It all depends on the conveniences of your reasoning.
I am 1000% satisfied with my OEM navi. 1000% glad I opted for it. I am also 1000% sure I would get it again. Everybody I know who has portables have all commented when getting into my truck how nice the screen is and how easy it is to see and use. They also like how it fits without the suctioncup on the window with the wires or having to take it down and hide it when leaving the vehicle.
I don't have to justify my purchase as to me it was a great option and well worth it. My opinion here, for what it's worth...
