I like Macs most of them.. I love the older C11,20,22 or the MX110z they are all wonderful when restored or not, depends.. I really like some of the SS pres . C45, MX120, 121, and 150. I like my C2500 too, what a nice preamp.. Macs are simple to please. Use Telefunken valves in their preamps.. If you do work on the units stay away from yellow polly cap rebuilds.. They were built with PIO, rebuild with PIO.. LEAVE the Black Beauties..
Regards