Last weekend I borrowed an '03 Excursion with the 6.0L diesel from work to tow my boat out to Greenville, IL. I was completely blown away at how well it towed my boat! I set the cruise on 80MPH and it never downshifted out of overdrive once to maintain speed up hills. My 5.4L Expedition would've been in and out of overdrive constantly and down to second up hills to maintain 80MPH. Here's a pic of the setup from last weekend.
I'm thinking about ordering an '04. If I do, I'll definitely check the "Pimpdaddy Appearance Package"(22's and a 3" drop) box so that it looks like this F-250 below.