OK, I can see the need for power for running WinUAE (especially if you're talking about concurrent web browsing).
But what makes you think you need another i5 system for movies?
Because my movie room with my 61" monitor is in a different room

Media playback doesn't require anywhere near that much horsepower.
I hadn't really thought about that. It is just that I want to buy 2 identical computers. So when I discover something screwey about one of them and find out how to fix it, I know it applies to both machines.
I actually don't mind my winuae computer making some noise. But I really want my movie computer to be quiet.
I have watched movies on my brother's airplane computers. And it just sux. I call them airplane computers because they sound like an airplane readying for takeoff when u turn them on. There are a lot of whirring and whining sounds and a huge amount of airflow. He always buys the noisiest gfx cards produced by any Earth-based civilization. One of his gfx cards makes more noise than 2 of my "noisy" computers.