Cruicially, what is your overall budget, what are you trying to achieve with the setup and what will be connecting to it?
Is it just films or music?
I would personally stay away from Curry's, but in my opinion, you can't go wrong with Richer Sounds or Super Fi. They have very helpful and knowledgeable staff as well as demo rooms etc. They are also usually much cheaper than other high street electrical firms (Or will price match if not).
Work out your budget, read some reviews and then go to a shop and listen to them in action. Take your fav Blu Ray / CD and see what they sound like and more imprtantly, what they sound like matched with the amplifier. Very similar to car buying... you wouldn't without testing it first!
I have an Onkyo amplifier and can't speak highly enough of it, but Denon, Onkyo, Sony and Yamaha are all good bets as far as AV amps are concerned.