Will this set up work ok with my original 2rear Tannoy speakers and sub? And is this set up just 2 front speakers or 3? Thanks again.Does it have to be another sub/sat system?
Have you considered just upgrading the front 3 speakers instead of the whole set? This will give much better overall results and speakers that will really get the best from your receiver. Your current Tannoys (and any £300 speaker set) is not going to do your receiver justice.
I would look at the Wharfedale Diamond 10 series as the front 3 for example.
You could continue to use your current Tannoy rears and sub and then upgrade them later. There are dedicated centre speakers in the Diamond 10 range so I would recommend changing the front 3 speakers at the same time.