Welcome. I agree with everything that's been said about the C1. I have had my hands on two. The first one I let go to a member here. I recently managed to get another. I used it for the first time last week to test and compare 2 different pwr amps. For it being so old/vintage I was impressed with the sound quality. It truly has a WOW factor. Now, like you I plan to upgrade it (caps at a minimum). It is hard to believe it can sound better than it does now, but I want to see (or should I say hear).
You've joined an awesome group of people here. Trust us, you'll buy and seek other Carver pieces and time passes.