Yahama AS501, for the money it was more 'bang for the buck' so to speak, there's an AS701 but for me it didn't have any extras I thought of as worth having, there were also a couple of other contenders but again they had extra stuff, this seemed to be a more straightforward amp if you know what I mean, and it sounded great in the shop. Only problem is now my speakers are a bit of a weak link so I'll have to get new ones which is a shame, I did have to repair them a few years back when a child thought poking the tweaters in would be a good idea. I suppose my stuff has had a reasonable run, it lasted about 20 years.