As usual, I recommend the KEF Reference-II. these were made for something like the ARC VT-100 (which I currently own). Before committing to anything else, make sure the speaker has a tube friendly impedance curve. My Audio Artistry Dvoraks are a tough load and sound flat and confused with the VT-100. Lately, I've been trying solid state amps and the Dvoraks and they just light up and sound wonderful! I've used the KEF's with an ARC Classic-60 and the sound is all you could ask for. Hope this helps...
