Haven't heard the Orchard product.
I was going to purchase 2 of the Purifi 1ET9040BA (most powerful Purifi product) from Buckeye. Dylan, at Buckeye, talked me into the Ncorex NCx500 stereo amp for $995, saving me over $1000. Dylan said I'd be thrilled with it. He is CORRECT. This NCx500 is incredible.
I'm a class A and class A/B guy. I've got the Buckeye setup in my office, driving some $2,500 bookshelf speakers. It's sitting right next to a high-end tube amp (the Buckeye is far more pleasing to listen to). Currently I've got a McIntosh MC207 at home in my large 2 channel (and theater) setup. I own Parasound Halo, Parasound classic, several Adcoms, one large Acurus amp, some older PS Audio, and many other assorted power amps (along with listening to many other high-end amplifiers, Marantz, Classe, Mark Levinson, Pioneer SX-1980 (which may be my very favorite), many McIntosh products, Krell, Plinius, etc).
I'm not saying that the Buckeye is better than all of these units...but I wouldn't say they are better either. I love my big Mac MC207 at home. So smooth. I can listen for hours and not get ear fatigue. The Buckeye is just as good...I mean that.
I've heard a lot of class D trash over the years. The NCx500 is so FAR from old Class D. This little $1000 Buckeye is as good as my $9K Mac amp...it's that good. I'm sure the GaN amp is great. I GUARANTEE you'll be more than pleased with the Buckeye at $1000. I really am amazed by this technology.