Heres what you do
1- buy Apple TV
2- get a program called iflicks, run your movies through the program it will add the metadata for you & it will add the movies to iTunes , as long as your movies are mp4 or mkv you won't have to do any converting , so each movie will take a few seconds to a minute when you run them through iflicks
3- now you can watch your movies on the Apple TV
My Apple TV is wired Ethernet so I dot have any buffer problems streaming my 1080p movies
Oh and iTunes has to be running on your computer in order to stream to your Apple TV , but you can put your computer to sleep & streaming will work