My amp has no faults

No amp can drive all speakers made.

You first have to sort out that distinction.

Then there is the simple fact that tubes have a different sound (less odd ordered harmonic distortion) which is why they are described as 'smoother'.

You have to sort out if you like that.

So there are preferences involved. In my case, if there is brightness (extension and speed are not brightness by the way...), its a deal-breaker, so I avoid transistors.

I said it best first. And for that we should all be grateful.

Okay, we have four players, five including me. Elizabeth is clearly not happy with her Bryston, lots of those for sale used. I think I might venture Wilsynet's and Timrhu's Hypex Ncore NC400s. Lots of great reviews on them. Besides, I have no experience with switch mode amps. Not that I'm unhappy with my Acoustats, they speak for themselves. Don't you just love the future? Thanks guys.

Elizabeth doesn't like her Bryston? Man...my entire reality is shattered.

I'm just guessing:) Btw, just because an amp performs as designed doesn't make it a "good" performer in any circumstance. In any case, you haven't named any names.