Hi there, if I'm setting up a Roku device in the bedroom farthest from the router, should I go with a device with the "fastest wifi available?" Like the Roku Ultra?
Maybe. What's more important is the signal strength you get in that location.
Note that the Roku Ultra description mentions "fast" and mentions "best Wi-Fi" but nowhere does it say "fasted WiFi." If you're getting 25 Mbps consistently to a streaming device (Roku or other) then you'll be able to stream UHD/4K without issue. Anything faster won't make a difference.
DBDukes
Roku Community Streaming Expert
Note: I am not a Roku employee.
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That makes sense. Thank you!