What are the best GaN Amplifiers available today?

@blisshifi Thank you for taking the time to form such a detailed reply, it is exactly what I was looking for. I have been using Class D amplifiers for almost 20 years and the technology keeps on improving, IMO they are the future of amplification. It seems like the Achilles heel of the Class D amplifiers (the top end) is becoming less of an issue with the latest generation. Of course regardless of the topology used, the design of the amplifier is the most critical factor. My speakers (Vienna acoustics Mahler) require the amp to have good grip of the bass units and be fast otherwise they can sound lazy, so they work well with class D amplifiers. 

Even though GaN transistors were not designed for the HiFi industry, they could suit class D topology since they are switching much faster (decreasing dead time, easier filter design, etc) but again it all depends in the implementation of the amplifier, you can't say because an amplifier uses GaN transistors is better than one that uses MOSFETs or bipolars, we need to talk about specific amplifiers.

@markmuse -  I got my modded Gan1 back from Ric less than a month ago, so he is still doing them.  Best to call him 9r send him an email to be sure.

I had a D-Sonic Class D using Pascal module (new about 4 years ago) it was powerful, but it was not as resolving on top as the GAN amps I had afterwards.

I also had a NAD M22 V2 which is also Class D and I returned it since it was not as good to my ears as the similarly priced Benchmark AHB2.

As stated by Greg_f above......it is implentation that determines the final sound.  All Ganfet amps sound different and not necesarilly better than Mosfet based amps (Purifi and Hypex).  Modded high power Purifi amps (VTV even has a tubed buffer version for more 3d liquid sound) sound outrageous.  All class D amps will sound much better with mods.  Recently I have done more mods to the LSA Voyager that are also applicable to the Peachtree GAN 400 (they use the same amplifier module).  Modded Purifi, Peachtree, LSA and Orchard all sound really really good.  Just tonight I finished my first modded Hypex Nilai stereo amp......pics are now online......Yes, I am still doing mods....and mod all the above.  More info and pics will be added in the next couple of days.  I have done a couple more mods to the Peachtree Gan 1/VTV amps since yyzsantabarbara got his and will be trying another mod to the unit I have here now. 

@ricevs

It is impressive how much more performance is gained by implementing tweaks.

Which amp among the ones you modify is your favorite (no matter class)?

Do you modify other classes amps?

Do you replace PCB track connections with point to point connections, and internal wiring with better quality?

Where would you place your favorite modified amp in comparison to higher tier amps (no matter class)?

Thanks