If you want top of the line it's the Nvidia Shield TV. It might be hard to find right now. I have the 16gb version 1 with the remote and it's flawless. They also sell a 500gb version 1. They've just released a version 2 which is basically the same thing.
In the past the only knock on it was the lack of Amazon Prime TV support but the new firmware update will bring that with it.