I phoned around today to get some prices and was given very different advise from each shop.My Tannoys are now discontinued so getting the same model to use as the rears is no longer an option.One store advised on ditching the Tannoy's and getting a new full matched set of speakers.This will be too expensive.The other two options are:- Put the Tannoy Mercury M1's on the back and buy a better set of speakers for the front.Along with a matching centre speaker. OR Just buy the Mission 77DS's for the back and hope they are compatible with the Tannoy's.I will probably buy a Tannoy MXC centre aswell if I decide on this option. I have been using the Tannoy's for some time now and have been happy with them. However I have just bought the A/V amp and DVD more recently.So Home Cinema is new to me and I am really not sure what to do for the best. Anybody out there using the Mission 77DS's without Mission fronts please advise. Anybody else with advice feel free to voice your opion!