Another vote for the Yamaha 'Z7. Here in Australia, the 'Z7 is significantly cheaper than the Denon AVR4310 - about 750GBP cheaper.
I personally don't feel that Denon A/V Receivers are a step above other manufacturers, at all. Sure, they have many fancy logos on the fascias of their products and their brochures are brimming with features listings, and their build quality is very good (and most of the models bar the lowest models are manufactured in Japan), but for me, they sound a little too closed-in and are way over-priced.
In regards to availability (or shall I say un-availability) of the Yamaha 'Z7, I was speaking with one of my friendly local retailers, and he informed me that the 'Z7 is unavailable for MONTHS here in Australia. Yamaha had certainly under-estimated how popular the 'Z7 would be!
In fact, there is a special here in Australia, for the flag-ship 'Z11 with a Yamaha Blu-ray Disc Player - for AUD$6,500.00 - about 3,300GBP - for the 'Z11 AND Yamaha Blu-ray Disc Player!
Dan.