with out a rental car - I won't stay offsite.
I would go with a value resort - I happen to love Pop Century!!!
More offsite places have transportation 2 to3 times morning, 3 to 4 times evening and that is it.
plus you have to get there from the airport - at your expense.
with disney new DME - disney will transporte you back and forth from the airport for free.
this is for any room or villa that is Disney owned and operated and includes the DVC resorts.
Now if you are willing to go with a rental car - I would have a different opinion.