thanks once again for all the replies. I'm going to keep the Sim Audio in mind, try to audition the YBA. Goose, there might be a reason why the guy is steering me away from the Macs, but he was selling some. My first preference for amplification, without an adequate test, was the 6900. I like the convenience of having the phono stage built in and a headphone jack. I loved the sound with some Tannoy speakers. But if I can get the YBAs, I may well buy them unheard after all the reports I've read here. The Gryphons are also still in the equation though I won't be able to buy them for about eight months at least and cost is an issue there.
thanks again for all the very useful and helpful replies.
thanks again for all the very useful and helpful replies.