What's the difference between Roku Ultra LT and the Ultra 2020? I had a friend that purchased the Ultra 2020 and was not happy with some of the picture qualities on a couple of the streaming services being too dark. He stated that he went back to his Ultra 2019 unit and the picture was much better. I am looking to upgrade from my 2018 Ultra model but maybe I should just go with a 2019 model, but all I see is the Ultra LT or the 2020 model. I don't have home theatre system so not sure if I really need the 2020 model to take advantage of the sound upgrades it has. And if my buddy has picture issues with his 2020 model then maybe I should just get the standard Ultra model and save a little money.