I am setting up my first home cinema system (Denon AVR1906, Tannoy FX5.1). I have read that the Tannoy FX centre isn't that good (it is in fact a normal satellite). Would it be worthwhile getting the EFX centre for £40 or perhaps the Mission M7C2 centre for £60? I'm not looking to spend wads of cash on the centre but if the existing fx centre is poor with dialogue then something needs to be done. If the answer is yes should the surplus Tannoy satellite be used to make a 6.1 system (an extra rear?) or should another satellite be bought to make it 7.1?