Then wouldn't it be wise to wait until you have the 4X4 before buying new tires?

I think you'll find that most will recommend the BFG ATs or MTs and some will recommend the Pirelli Scorpions. I don't know much about the Dueler's performance so I can't be of much help there.

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2000 Silver Ice SE 4X4 Auto
http://albums.photopoint.com/j/AlbumIndex?u=1406935&a=10805120