Thought I'd clarify a few of the points made by other reviewers. Firstly, you can see a third channel whilst recording two others, but the choice is limited. E.g, if recording BBC1 and ITV1 at the same time, your choice will be limited to other BBC and ITV 'group' channels, using the same multiplex frequency. If you try watching Virgin1, forget it.
Neither this machine nor the 9300T with its HDMI port are 'HD upgradable' - the port on the 9300T is only for upscaling to 720p.
Anything you've read about fan noise has now been cured with an over-the-air update