I'm doing some research and trying to decide the best dvr to get for my iMac duo. I can't get OTA HD which was a bummer so that's not a feature I need but if the price was close with the feature that could be a perk. What I'm looking for is a DVR that does not require much processing power from the iMac & encodes the video on the fly to Mpeg 4, so that all I have to do is add it to itunes & its ready for the Apple TV. Also do any of these allow you to connect them to your TV so you can watch the recorded shows on the tv? thanks for the help.