Unfortunately I think you are asking a question that only your own ears can answer.
I am at a lower end from you, but I went from a MC-352 to a FPB-300c (pre 400cx amp). I am very happy with the improvement when I changed. I had the Mac for not quite a year. I bought and sold it here on Agon for no loss, but lots of enjoyment while I had it. It drove my current hungry speakers better than anything I had before.
Nevertheless, I like the improved clarity and precision of the Krell. It too has no problem driving my speakers. The Krell does seem to take more time to warm-up though...that is something I didn't notice with the Mac.
See if you can demo. At this level, it is the only way to truly know.
Good luck-
I am at a lower end from you, but I went from a MC-352 to a FPB-300c (pre 400cx amp). I am very happy with the improvement when I changed. I had the Mac for not quite a year. I bought and sold it here on Agon for no loss, but lots of enjoyment while I had it. It drove my current hungry speakers better than anything I had before.
Nevertheless, I like the improved clarity and precision of the Krell. It too has no problem driving my speakers. The Krell does seem to take more time to warm-up though...that is something I didn't notice with the Mac.
See if you can demo. At this level, it is the only way to truly know.
Good luck-