http://www.5starvillaneardisney.com/
I rented this one in Feb 2011 in Emerald Island from a UK owner. She was a dream to deal with, and (if anything) the house was better than it appeared in the photos. Very spacious, and clean. Well maintained, and with everything you could possibly need for a great vacation. I highly recommend this place.
We rented with another family. We each had our own rental vehicle, which allowed us to do different things (mainly, we were together, but on several occasions we split up, and it was handy to be able to do so). This house, in particular, is great for a two family split because it has two identical master suites on opposite corners of the second level...so there was no need to discuss who got the "better" room, if you know what I mean. In addition, there were 4 other bedrooms, each of which either had an attached, private bath OR a "jack and jill" bath.
This is the second time we have rented in Emerald Island, and we enjoyed it both times. Convenient location for Disney, yet quiet and peaceful. Los of restaurants and grocery stores (both Publix and Super Target were 5 minutes away) close by. And, prices much more reasonable per square foot and amenities than Windsor Hills.
There are many options. If you check out the tax records to ensure that you are dealing with a legitimate owner, and they have local management, I would not hesitate to rent from a non-US owner. Both times I rented, it was from a UK owner and both times I got excellent value for the money.