Hi Ray, l have a 100c l bought last year and it is a piece that gives me pleasure every day. I first heard one with Bryston separates around 2005 and l never forgot it, although I went Rotel at the time due to finances. There is something about the way it looks that speaks to me although I appreciate that's not important to most audiophiles.
I have WE values on the speaker side which seems to be the usual upgrade. I don't use the headphone circuit as l have a STAX system but l compared it to my Bryston b135 2 amp with some cheap iem and preferred it for what it's worth.