Any resort on Disney property is going to be nice. Just remember..the closer you stay to the parks, the more expensive it will be. We have stayed at the All Star resorts, the Disney Institute and also the Caribbean Beach Resort. All were very nice. The transportation around to property is great. Buses run every 15-20 minutes and stop at every resort, it's just a tad busy when you leave a park at closing. Also, I believe if you are staying on Disney property, you get into the parks an hour earlier than the rest of the public on a day trip and if you buy stuff in the parks, they will take it to your room (so you aren't carrying it all day).
Have fun !!