This is where we always stay http://www.qualitysuitesmaingate.com/ It's about 10 minutes away, the suites allow you to stretch out and if you use the kitchen you can have snacks/drinks after a day the house of the mouse. There are also 2 bathrooms which is a huge plus in my book. LArge pool, free breakfast and a complimentary happy hour for the guests.
I have also stayed at the grand floridian and to be perfectly honest I like the Main Gate East better.