A quick query concerning Elgato's Eyetv. I'm undecided whether I should purchase either the 250 or the slightly cheaper Hybrid. More specifically, what is the difference between having hardware encoding and how will it differ? I will be using an iMac 24". Gaming will also be a factor. Are both of these products around the same for zero latency? I've searched around and it seems that they might differ because of how the image is processed. If someone can possibly shed some light on this that'll be great.