I don't rate the b&w 685 s2,especially for the cash they want for them.the original 685 were better sounding to my ears,for a lot less money.The cm1s2 are a lot better for around £600-£650.If you like the dali sound and can't demo anything,maybe the ikon mk2 could be the answer or possibly ex demo kef ls50.I think your amp could easily dwell in the £800-£1000 speaker price range.If it was me,I'd save a bit more cash and get the speaker that really sounds good with your amp.If you spend £500-£600 now,you'll only be spending more at a later date for the next upgrade and losing a few hundred on the ones your buying now.you know it makes sense,and you really need to try and dem speakers at these kind of price points,even if you have to go out your way a bit.