The new 2001 or 2002 G is coming soon and price is supposed to be reduced drastically. It's going through a major rebuild/redesign. You're better off waiting.
You have all mentioned $135,000 but you forgot to enlighten our man here and tell him that there is the small matter of about $20-$30,000 additional in luxury and sales tax. Out the door you are going to be light around $150-$160,000.
The new G is really supposed to be a much better truck. I'd wait.