Using a Rogue Audio Corona Mag II for three years now. No intention to change . I have my tube combination. Very good sounding amp when you choose the right tubes for it and what's right for you that is. Room is treated very important, all Wywires throughout. Everything matters. I have had more than a few different amps here nothing moved me. All others were solid state except fo my Pathos Classic MKII I ran for 5 years. Lots of variables and personal tastes. Again, everything matters. After many years at this I believe there is no reason to spend HUGE money being asked now for some products.Also buy used!!!