I have never listened to the Tannoy, but the GR20's are hard to beat at that price range. Very good for music too. I have a pair myself and a pair of the S8 which are also a fantastic speaker for a little less cash. I would not hesitate to snatch a pair of either the GR20 or S8. If HT is your only use then I would probably go with the S8 but if you want both HT and music then the GR20s. Always remember to pair them up with a good AVR and good cables. Good luck!
