Check out Todd Adams VX. He is running stock Amigo rims with 33x9.50 BFG's. As for narrow versus wide, it really depends on your terrain. Sidehilling on muddy trails is much safer with a narrow tire whereas bogging is better with wider tires. On rocks, I would recommend wider tires but obviously Todd is getting by just fine with his narrows.
Take into account also when you air down you are losing ground clearance so that 1/2" might seem more important and that 1" extra height can also mean a bigger deal in articulation. How much a difference? But your an engineer, so I am sure you love to think about all this stuff!
Sent from my "two hands on a keyboard"