If I'm taking a trip, I'm riding the Wide Glide. I purposefully haven't ridden the HD touring platform because I don't want to become dissatisfied with what I have (an easy thing to do). I lusted after this bike for 7 long years and, since I can only have one, this is it for a while. At some point, I may go up to a full-fledged tourer but I've done several 600+ mile days on the WG2 and, with any luck, will do many more.
I agree with the others, if you have a choice and you're going to be averaging over 500 miles/day, go with the touring platform. I have a buddy with a 2003 CVO Road King and he rides mine occasionally. He says he doesn't know how I keep up with him on the longer days. I admit, it's more of a challenge but if I wanted easy, I'd get the BMW 1600.
Photo below of The BEast out in the Tetons this year. 3,000 miles in 9 days. Trip of a lifetime!