Having begun years ago with the first Roku model, switched to the Roku 3 and recently got the Roku Ultra 4800R, its BY FAR the best device of all of them. Since I own an LG OLED, and home theater system, both audio and video are superior to the previous models and channels load much faster with the exception of Peacock. Regardless, if you're thinking of getting a Roku, I'd suggest the Ultra.
Power User (film maker)
Mill Valley, CA
Roku Ultra 4800R; LG OLED55B7A, ONKYO TX-NR636, Panasonic Blu Ray, Definitive Studio Monitor 450 (L/R), Definitive LCR 2000 (center), Definitive 10" sub-woofer, Definitive surrounds.