DH - I was pretty strong on my first suggestion, hopefully I can help again
The Infiniti has a wonderful powertrain, but that's about it. The vehicle is put together VERY poorly. Large hunks of plastic that squeak like crazy! It ranked the WORST (of all vehicles) in initial quality by JD Power & Associates.
If you can't wait until Feb of '06 for the new Denali or Escalade (which would be my highest recommendation) I would go with a heavily discounted Navigator (you can get a loaded one for about $54,000) or a Lexus LX 470. The outgoing Denali is amazing, but with the new one only 3 months out I can't suggest it (well except waiting for the new).