I keep trying other amps but nothing I've heard has outdone my Lamm M1.1s... on my Wilson Watt Puppy 7's which are a 4ohm load with a min of 3.6ohm. and this is the strongest 100watts of class A magic. There is a reason this combo has won some of the best systems sound at all the stereo shows over the years. The midrange is glorious, and the soundstage is huge, plus the mid/low bass has serious impact and most importantly CONTROL!
Getting an excellent preamp of course makes the experience even more enjoyable.
Plus the beauty of a single 6922 input tube per monoblock that are $25 each from Lamm!
You have got to hear any of the Lamm amplifiers (I owned the 2.1's also but this 100watts of class A power outdid my 1000watt a channel 125lb Class AB, so I went for more Class A bias)
They generate a ton of heat as a true Class A design but I just listen with the AC on, a cold beer, and shorts/tshirt in bliss! I spend more time listening instead of tube rolling which is most excellent for me, but might limit others.