I wish Plex on the Roku just turned my TV/Receiver/etc into a dumb yet high-quality media player. I don't want to use the awful Roku remote with a 10 foot interface -- I'm happy to use my laptop or phone as the control module and have the TV be little more than a digital "projection screen".
I use the Harmony One remote to control my whole setup, including Roku. It's not cheap, and it's a PITA to program (have to tether it to a computer to do it), but it works like a charm.