Tbg - You are right on target regarding Halcyonics. Hands down best platform I've ever seen. I too wish I could have more of them. Sadly they aren't cheap and have been made even more expensive because of the relationship of the dollar to the euro.
By the way, the original poster asked about a cdp with tubes. If you are addressing isolation/damping, the tubes need to be treated as well. Herbie makes devices that I recommend you try out on any tubes in your system. There are many tube dampers on the market and each may have it's own characteristics. I don't use tubes anymore, myself, but if I did I would experiment to see which dampers would tune your system to your liking.
By the way, the original poster asked about a cdp with tubes. If you are addressing isolation/damping, the tubes need to be treated as well. Herbie makes devices that I recommend you try out on any tubes in your system. There are many tube dampers on the market and each may have it's own characteristics. I don't use tubes anymore, myself, but if I did I would experiment to see which dampers would tune your system to your liking.