Right, I've narrowed my choice of amplifier down to the above three: Arcam P7, Meridian 558 or Bryston 9B. Meridian and Bryston amps both sound a bit better than the Arcam, but are also far more expensive per channel. (Per-channel costs: Arcam £357, Bryston £660, £733). Now, my first instinct is to buy the Arcam, because given the sort of speakers I'm likely to be using (B&W Nautilus 803/HTM1) either of the other two amps is probably heading into diminishing returns territory - that's to say I'd get more benefit to the sound from spending the extra money on fancier speakers. And the Arcam also leaves open the option of adding a 2-speaker surround back channel later at no extra (amplification) cost. The only problem is that I can't find anywhere that's selling a P7 ex-demo, while I have found a couple of places selling ex-demo Meridian amps. One place in particular is offering a 558.2 amplifier, only two months old, for £2565 which is (I think) £1100 off the new price. The cheapest I've found an Arcam P7 is £2300 new. And at those prices the Meridian may be the better buy. Does anyone know where I could get an Arcam P7 ex-demo for a reasonable rate? Failing that, does anyone know where I could find an ex-demo Bryston 9B? More general comments are also welcome, of course. Incidentally, has anyone had a chance to compare Meridian 558 and 558.2 amps? I've only heard the mark I version (and was very impressed). It would be nice to know they haven't messed up the mark II.