you have not really listed a price range. so this might not be a choice for you. but I would suggest trying to listen to a used darTZeel NHB-108.....which can be purchased in the $10k-$13k price range. they are $25k new. 10 years ago I switched from tubed Tenor to darTZeel (I now have the dart 458 monoblocks) since it had the breath-of-life of tubes, that always listenable smooth extended treble, and the low noise and amplifier grip of solid state. read about the darTZeel and you will find legendary swiss build quality, but mostly about it's lack of global feedback and low parts count in the signal path. and it's full bodied sweet midrange and great micro dynamics and lively sound. no grain, or etch, or brightness. just music.
best wishes in finding the right amp and I hope you get a chance to listen to the dart.
best wishes in finding the right amp and I hope you get a chance to listen to the dart.