The Viva Solista integrated has arrived and is up and running. I heartily recommend it, 18 watts Class A SET using 845 valves, it has delicacy, far more drive than my Pass Labs Aleph 3, excellent base and of course a magical midrange. I certainly prefer it to 300B SET's I have heard before, with the proviso that I have not had one one in my system. As other threads have asked, why are'nt there more 845 tube amps? You avoid the light base of 300b's, seem to have, more drive and the tubes are cheaper, all be it without the wide choice. I strongly recommend the Viva amp to anyone making a similar choice to mine. Thanks for your advise