OP, seems no one here owns either the Gamut D100 or D200 MKIII, so take with a large dose of salt any opinions about it one way or the other.
I auditioned the XA25 extensively in my home before buying my CODA No. 8 - decided the XA25 runs too hot when pushed, and also I wanted more current.
The XA25 is warm, smooth and detailed, but I would not say transparent - and also I hesitate to employ that term because I am not sure my definition of that term is consistent with yours.
A memorable amp I heard during my auditions was the new Kinki Studios EX-M7, which was as close to the famous Goldmund "Swiss" sound as I'd heard for under 15K. Hyper fast, detailed/resolving and powerful - and LESS than 3K new delivered to your door (the build quality is off the charts for something under 5K).
https://6moons.com/audioreview_articles/kinki6/
Not my cup of tea, but it might be yours, FWIW.
I auditioned the XA25 extensively in my home before buying my CODA No. 8 - decided the XA25 runs too hot when pushed, and also I wanted more current.
The XA25 is warm, smooth and detailed, but I would not say transparent - and also I hesitate to employ that term because I am not sure my definition of that term is consistent with yours.
A memorable amp I heard during my auditions was the new Kinki Studios EX-M7, which was as close to the famous Goldmund "Swiss" sound as I'd heard for under 15K. Hyper fast, detailed/resolving and powerful - and LESS than 3K new delivered to your door (the build quality is off the charts for something under 5K).
https://6moons.com/audioreview_articles/kinki6/
Not my cup of tea, but it might be yours, FWIW.