I give a STRONG second to the Ayre V-6X. I have had it as well as the Theta Dreadnaught 1, and while both were truly outstanding amplifiers I opted to keep the Ayre unit over the Dreadnaught. Teamed up with a pre-amp that offers HT pass through and you truly can get the best of both worlds with either the Theta or Ayre unit. The V-6X gives you everything the renowned V-5X does and has a pass through format between its channels that make bi-amping a snap. The Ayre's don't show up used often, and after having one in my setup for over a year I can certainly understand why! I did recently sell mine, but only afer I had auditioned the Ayre V-1Xe which took the two channel listening to yet another level. I'll need to find a decent amplifer to drive the rears now, but its a trade off I'm willing to take!