As per the title really. Main priority being to stay with a one box solution and get the best 2 channel sound possible from an av amp. Obviously know all about the Arcam's gremlins but pretty sure the 400 is a big improvement reliability wise than the 600 or 500. But still not prone from faults. Love my Sony for movies - cant fault it really but its getting old and I have been threatening (to myself) to change it for years now. I can't turn up the volume on the Sony too much due to living in a terraced house and having two young boys (although I tend to play Blu Rays around -18db which is plenty loud for me). And I guess this is my biggest fear that the Arcam won't have as much grunt. Front and centre speakers are PMC GB1 & PMC DB1 Centre. Finally, would sell my amp on ebay and definitely buy the Arcam 2nd hand (which is how I bought the Sony). Your thoughts please.