I'm looking at upgrading my receiver (Denon 1803) but don't know what to look at buying. I want to be able to notice an improvement over the 1803. I don't mind buying 2nd hand. I had thought about processor + power amps but i really can't justify spending £500+ on a processor and so have decided against this route. What receivers should i consider - Denon 3802/3? Pioneer 2011/AX3/AX5? Yamaha 1400? I would also consider adding a stereo amp if this would improve it. Or forget about the stereo amp and spend the extra on a receiver? I don't have a fixed budget but obviously cheaper is better for my bank balance.