The only way I've been satisfied thus far with the performance, et al, of digital movies is by having a dedicated computer (could be any computer with enough power to play hi-def videos and an HDMI out, mine is an older notebook) hardwired to the primary router though a switch (as is the movie server). This allows VLC to play whatever format movie from the server, over cat5, directly to any TV with an HDMI input.
Wireless is convenient, but nothing beats direct cabling wherever feasible. I have yet to own a TV which actually worked up to my expectations/standards using whatever built in streaming features it has except for streaming from Netflix or other streaming services. They've all been glitchy as hell streaming from a home dlna server.