If you want the best possible audio and video, the KScape stuff is the best. If you intend on buying a bunch movies you'll want a Terra as well. If you are only going to rent stuff then the strato will work.
Keep in mind that KScape is not a streaming service like Netflix. If you rent a movie you have to wait for it to download (which is approx 6-10min on gb internet speed) before you can watch it.
On a side note, bit for bit to the original file, it'll best even a 4k bluray disk.