Just got back from the Poly (narrowly missed Frances - last flight out of Tampa 9/4) and my kids LOVED it there! DS-9,DD-6,DS-4 & DS-2. If you can choose a deluxe I would highly recommend the Poly because there is so much to do for the kids.
The pool is zero entry with an AWESOME slide, they have arts & crafts in the GCH practically everyday, Hula lession once a week and a little known fact - the Neverland club is open & free to resort guests from 12-4pm. My kids didn't want to go to the parks - they wanted to stay at the club - they had dress up stuff, HUGE projection TV, arts & crafts, video games (free), computer games and a ton of toys to play with. We went twice during our stay and had the whole place to ourselves for hours.
I also agree that all the reorts are kid friendly but the deluxe resorts have more planned activities than the mods.
You've got a tough choice to make. Good luck!