Buying a new iMac or Mac Mini with 27" display. I'm in Japan so options are limited if you can believe it. Today I only found the IODATA GV-M2TV. It's good for Mountain Lion but don't know what will happen with Mavericks. Has anyone tried this model before? Any other recommendations? Compatibility usually means if the channel guide software correctly displays that regions channel line-up right? If someone doesn't care about that would any tuner do? .