I'll third the praise for Roku. The only annoyance is that they put ads on the homescreen, (but that can be blocked at the network level), and that different a

I'll third the praise for Roku. The only annoyance is that they put ads on the homescreen, (but that can be blocked at the network level), and that different apps tend to have slightly different/inconsistent UXs, for example pressing "up" while watching Netflix will show you the timeline without pausing, but doing the same in HBO Now will take you back out to the show info page. The dedicated remotes are nice, though sometimes oddly slow to "wake up". Some models even have headphone jacks on the remote, which can be really handy. All the versions can be controlled through a really nice Android app, which lets you directly enter text rather than pecking around in a grid keyboard, and also lets you forward audio to your phone/headset instead of the speakers or remote.