Sorreltiger:If you're using it for music, I 'd go for the Yamaha personally. I think that there will be some improvement over your existing amp, but not earth shattering as the differential isn't great enough. Just a thought - do you really have two subs and no centre speaker? It looks that way in your signature?
I have got the Yamaha in London today. Decided to stick with them. I might be deaf or something but evn though I increased the volume trim to 6db but it doesn't sound loud as the young brother 765.... However I do feel a improvement music wise. Will spin the blu-rays tomorrow and see how it perform. Got Flight of The Phoenix, 2012 and James Bond Quantam of the Solace. I am happy with the Monitor Audio Sub boy oh boy I am loving it.