Hello Signal Man, and welcome to thecarversite.com. We're glad you're hear. There is a lot of information here, much technical know how, and a pretty good bunch of folks that are happy to help.
I believe @loner_t has a BillD modded C-1 for sale. A BillD C-1 paired with an mkII modded M-500 or M-500t is a great combination. I know I love my BillD C-1, and it sounds great with an M1.0t mkII opt2.
Please consider uploading some pics of your gear in the Members Systems area. We all like pics of all kinds of audio gear.
In the meantime, kick your shoes off, turn up the music, and welcome aboard.