I wanted to bring this thread back up with some new thoughts, being a couple years since the post. First off, for all you saying stick with a suburban, you were right.
Bought a 2002 Excursion with 102k on it. Flew to Cali to pick it up and headed back to Colorado. It was an amazing vehicle for the year I owned it, but it just wasn't for me. I didn't love the diesel and it also felt like I was sitting on a gold mine with it being so nice. I knew it could fetch some coin, so I sold it for 6k more after putting 17k miles on it.
A few notes. Best mileage I ever got was 17.1 mpg. It averaged about 13-14 towing my snowmobile on highway. Around town and at my house it got 11.5 (live 3000 feet above Boulder and do that drive to town). This wasn't enough for me to keep it, especially considering all the time to rework the pop top. The interior also felt cheap to me, the seats nowhere near as comfortable (however, I loved the room inside, its huge.) The noise did get old too. They are loud as ******** if you're coming from gas. On top of it all though, I hated to drive it. The ride and the handling were terrible compared to my suburban. And until the turbo kicks it, you really don't have much horsepower. Was it fun to try out though? Absolutely, just not for me. I will say though, I miss the 44 gallon tank and ~650 mile range.
So I found an 8.1 burb... 96k miles, 2001, in Pewter. Compared to the ex, suburbans drive like a race car—cannot emphasize this enough, they are way more fun to drive. Off-road, windy roads, even parking. Add the 8.1 and you really feel it. That off-the-line power was back. Here is a photo right after I got it.. don't worry, chrome handles removed.
It's now been almost a year since I have owned it. Best mileage is about 14-15 mpg going 60. See 12-13 occasionally. Otherwise it's 10 flat pretty much no matter what. 75-80 on highway or around town. Same with the snowmobile on back. Doing the math, I really don't pay much more than the ex in fuel. And even if so, I'd still go 8.1. It's just a pleasure to drive. However, after being in my '03 for close to 18 years, I miss the updated interior. The seats in the '01 don't really compare.
They both have their advantages and both are amazing vehicles, just depends on what works best for you and what feels better behind the wheel.