I also have the Stereo H2O (s-250)in my system. I bought it after visiting Henry last summer when he still lived in Richmond, VA. I bought the amp to use with my Apogee Scintillas that are being refurbished. Meanwhile, I have been using Von Schweikert VR-4.5s with them. I love the way S-250 sounds with my new Supratek Chenin. It is the best sound I have ever coaxed from my system. The stereo units do take quite a while to break-in (read the reviews posted elsewhere.) I also think that the amp is so neutral that the preamp and cables used is very important to the overall sound of your system. I love the way tube equipment sounds so having the tube preamp is ideal in this situation. I do not miss at all having a tube amplifier which is really amazing. While it is hard to imagine my system getting any better than it is, the Scintillas should even take it a few steps further. The amp is very good and well worth an audition. The caveat to what I have written is that only your ears will tell you what is the truth. Either way you go, I wish you well. Bob