mcintosh 501's treble extension; yes or no?

Every review I have read on the 501 monoblocks rave about their dynamics, soundstage, bass control and mid range. They are not as enthusiastic about their treble extension and the ability to retrieve fine details. I sold a mcintosh 7000 integrated and was pleased with the treble extension, etc. Has any one compared these two and what are your thoughts on how they stand up to each other in their ability to retieve fine detail.