I just took delivery of an 06 last week. We had a 01 LC 100 and the 06 is sooo much better. The ride is better, it handles better, there is more power, the transmission is sweat and interior has been updated a lot. Bluetooth, backup camera, VVTi engine, variable valve adjustment ride height suspension. Also with the understanding that I did not buy the LC for gas mileage, it is better. Just drove a complete freeway trip and clocked 16.8 mpg with only 500 miles on the LC. The best I ever saw in the 01 was 14 mpg.
Now we bought this LC as the kids carrier and my wife drives it, so it will never really see any 4-wheeling, about the most it will see is snow in Tahoe.