Thank you very much for these interesting answers! Probably I will stay with Accuphase for the moment. When I will find a very very good tubes amplifier I will try to get it at home and listen.. One friend told me that I could buy the new Accuphase A-65 power amplifier and the C-2820 or C-3800 preamplifier. Both very good, but I dont know how well they will synergy with Khorns. Unfortunately, I cannot take them at home..