Hi
I don't have much experience with the Extremas, but I own and know both Gamut and Clayton very well. They are both neutral amplifiers without a hint of stridency.
The Clayton M300's and the Gamut D200 or M250 (I have a custom supercharged "Gamut-like" unit purchased directly from the original Gamut designer/engineer (near Copenhagen) who designed the single mosfet pair/channel output) are both state of the art in my opinion, and can compete with anything out there regardless of price.
I don't have much experience with the Extremas, but I own and know both Gamut and Clayton very well. They are both neutral amplifiers without a hint of stridency.
The Clayton M300's and the Gamut D200 or M250 (I have a custom supercharged "Gamut-like" unit purchased directly from the original Gamut designer/engineer (near Copenhagen) who designed the single mosfet pair/channel output) are both state of the art in my opinion, and can compete with anything out there regardless of price.