Well, now that I have gotten my mind around $2000 being ALOT for 6 days at WDW (life is really more expensive up here than I thought) I have this to say....
If you are planning a once in a lifetime trip to Disney - wait a couple years. Otherwise, if you do this regularily, I guess, you don't have to always do what your kids most prefer - you get to pick sometimes too, so go ahead with your trip.
We just got back with a 4 and 7 year old. I have to echo Chicklet's sentiment. The 4 year old did not get his money's worth out of it. He had a good time - but he really missed his Nintendo back home. He got tired of just going places so often. He just didn't get the whole point of it - just doesn't understand the "now or never" aspect. He was ready for most of the rides - but Disney rides really aren't the be-all-and-end-all of rides. My kids see better yearly at Wonderland (Toronto). The Disney rides with the themeing and all - really my husband and I appreciated that more than the kids. This was as we expected. We chose this year to go, because we wanted to catch the older one in that phase where she knows the characters aren't real - but has to remind herself of that - where she can just have fun. Really didn't want to have to hear the world "lame" in reference to any expereince we were spending thousands of dollars on for her. I don't think we can count on this perspective holding out until the year she is 10 and her brother is 7. So we took the unappreciative 4 year old perspective over the unappreciative 10 year old perspective. We probably will go back when the 4 year old is 7, so he gets his chance.
The 7 year old really clicked in. She missed pets and friends, and told us that next time a week vacation would be long enough (we did 7 days in Orlando and 4 at St. Petes). But, she had an idea of what Disney was, really got into character signatures, pressed penny collecting, character meals. She wants us to take her to
DisneyLAND now (not!). At 7, she appreciated that she was somewhere special that not all her friends had been too. I think that collecting thing they get into around that age really spices up the experience up for them. She's not telling everyone who will listen about the Disney rides she went on (afterall, they all do Wonderland too, and really there is no comparison from a thrill perspective) but she is showing everyone who will look her pressed penny collector book and her book of autographs. The special expereince at Disney for her was "finding" the characters and pressed penny machines. The 4 year old was into the pennies after his sister introduced him to it. He also has his autograph book - but some characters he just decided he didn't want. Maybe they were a littel scary (Pooh?). I just think he didn't really get it.