"Every time I go back to my Conrad Johnson gear, it makes me realize how good it sounds. I do like the variety of different gear, but never lived with ARC. A friend had it and it was great but can not comment on how it differed from my CJ gear because the systems were totally different. I do feel that my CJ gear is a touch sweeter, which I love. The ARC gear may be more of an experiment but have other friends that swear by it."
I've had several pieces from both brands and while they sound different from each other, both are excellent. For me personally, if I was to go with ARC, I would use a matching amp and preamp, or an amp with a fully balanced source with its own volume control, like my Wadia CD player.