I've got a 2000 Excusion 4x4 Limited, and I love it! Keep in mind that most 'Burbs are 1/2-tons, while the Ex is a 3/4-ton. There are some 3/4-ton Burbs around, but it's a pretty small percentage. 55% of all Excusions sold were diesels. The 7.3L diesel was just too noisy for me. I think Ford introduced the 6.0L motor in the 2002. It is much quieter and an excellent diesel.
I sell and deliver firewood, so I tow a 12K pound dump trailer with it. The V10 is a strong motor and delivers all the torque I need to drag that trailer up steep hills. I also cruise down to N.H. to visit the daughters, and it is a very comfortable highway cruiser. I get about 11-12 mpg in average driving, 14 on the highway (74 mph) and about 9 pulling the loaded trailer. With a 44 gallon tank, you need to stop at the station with a full pocket. /forums/images/graemlins/wink.gif But on a trip from Maine to SC, my first gas stop was in Washington, DC. Fuel cost was never an issue for me. There are only two SUVs out there that will pull a 10K pound trailer safely.
As for problems, I've really had none. The stock brakes are not up to the task of a heavy trailer, so many owners have upgraded with after-market. The door locks were a problem, until Ford redesigned the lock. But I still have all the original actuators working. I change the fluids every 2-3 years, so I've had no problems with transmission, transfer case, or differentials. At almost 90K miles, I'll need an exhaust system soon. Because it's a heavy duty truck, the repairs are not cheap.
I've never questioned my decision to buy it. It's sad that Bill Ford capitulated to the Sierra Club /forums/images/graemlins/mad.gif and stopped advertising the Excursion. While railing about gas mileage, they ONLY quote the V10 mileage, even though more than half the Excursions get almost 20 mpg!