You will get RT playback on your NTSC, but to see it in it’s complete res you will need to render. There are probably hardware solutions to solve this issue. Quite frankly, the render time is so small on most things that to wait a couple of seconds to see multiple layers rendered is not that big of a deal. I’ve never used a Media 100 system, but it seems like a lost platform to me. FCP is the Apple standard. Welcome aboard!
Tim