Originally Posted by oimi 
Thank you for your suggestion, which has resulted in me looking at more expensive models made by Denon.
What do you think of the Denon 2808 as well as the more recent 2309? What are the differences and how is it that the older model is supposed to be better?
The Denons give a very smooth sound, but due to recent price increases you'll be lucky to get a 1909 for under £400 let alone a 2309 or above.
The London City branch of Richer Sounds had 2 1909's left in silver on Friday when I called, but you have to buy in person as Denon have a no mail order policy in effect.
Getting any amp with the spec. you described is very difficult at the moment for under £400. You may have some luck getting a Yamaha DSP-AX763 for £300 - £350 if your willing to pre order and wait. This has a very good sound and the spec you require.