From reading your responses, it seems to me that if I subscribe to Amazon Instant Video
and then hook up my TV via HMDI as in effect a monitor for the pc and load up the browser
I should be able to watch the channels effectively on the TV.
The mouse I use is wireless so I reckon I could choose the channels with that.
So I would not need the IR receiver or a remote etc.
The xbmc does not seem much better than freesat. I think a freesat box plus the Amazon through the browser would work for me.