Currently, I’m using a c-28 preamp with my MC-7270 power amp. I saw a c-26 preamp in Missouri for sale, and this one underwent a pro restoration last month. I’m really interested in purchasing the c-26 to have as a backup, because I’m sending my c-28 out to be pro restored. I’m also curious to know which of these two is most preferred by Mac purists when it comes to sound and build quality. Please let me know