If these two were the same price, I'd obviously would go with the Lexus GX470 (just my opinion)...but I have 2 great deals on the table from a dealer:
new 2007 Lexus GX470 for 47,000
new 2006 Lincoln Navigator (Ultimate) for 35,000

I prefer the Lexus, but the Navigator is at such a great price (on a side note, why do these Navi's depreciate so much, so fast in just one year?? 06 Lexus is still in the mid-40,000)

Which one should I get?
And which one would age better as I am looking to keep this for the next 8-9 years at least....

get the lincoln

Lexus all the way baby! great cars!!

I must agree. Lexus is a much more reliable car manufacturer. Of course, if you are planning on selling the Lincoln after four years, I suppose that you will be fine. For a long-term purchase, choosing Lexus is the wiser decision to make.