I have an unmodded Coda #16 amplifier in my reference system. I am most pleased with the sound. Powerful, dynamic, crystalline, and spacious. The downside is that, like my Pass Labs amps, they are 110# so u risk herniation your lumbar spine every time you move them. They run mostly class A but do not get very hot.
Based on sonics and with direct extended listening experience with over 25 amps I have owned, the Coda #16 sits at the top of the list. If the LSA Voyager GAN had more low end heft and meat on the bones, it would be near the top as well.