Interesting question, but it is quite difficult not to list favourites.
Opeth - Blackwater Park
Tool - Lateralus
The Mars Volta - Deloused in the Comatorium
Leprous - The Congregation
Pallbearer - Foundations of Burden
According to Netflix you need a 25mbps line to stream 4K without any troubles.
However Mybroadband did a test and the 4K stream never exceeded 16mbps. Maybe you'll be fine with the 20/20 line speed...
Here's the article...
Also went to go see Dr Strange on Friday, it was really good. Some really awesome visuals.
Midnight Special - Saw this tonight, also an enjoyable SciFi film.