In my path to upgrade my stereo music system, I bought a used thiel cs2.3. To suit this well reviewed speakers, I bought a new Parasound 2250 power amp. At the moment I am using the pre amp out of my Marantz CR611 and enjoying the music. Although I feel the sound can be improved by a good preamp. I am in a look out for a good Preamp either used or new in a budget of around 100k. Greatly value all of your expert thoughts.