Thank you for the replies
The nearest Hummer dealer is nearly 3 hours away (a long ways to test drive).
When in Colorado we plan to pull an trailer full of ATV's. This is probably closer to 2,500lbs. (Colorado Law states that any trailer cargo over 3000lbs is subject to trailer brakes) Our main concern is pulling our 3,500-4,000lbs ski boat through MO up and down their big hills.
How would the H3 preform when dolly towing a Jeep (4,650lbs) ? We do this often with the H2 and can pull any speed to be desired.