2026 best deal in audiophile class D stereo amp?

@kennyc so have you auditioned some of the other popular class D amps being suggested here?  (Class D audio, Buckeye, PS Audio, Laiv)  Or are you basing this on reviews?   The Atma-Shpere are very highly regarded and there is a used pair on audiomart... but there is also a Class D Audio GanFet 2 channel for a quarter the price.  I wonder if I could really hear the difference.  

I have received the provisional BOM for my custom design Class D Power Amp to be produced for me.

The BOM is not far from the cost of a cheaper option on a Quad of Power Amp Tubes I use, and near the cost of a respectable pair of SET Tubes I use.

Costs to be incurred will be any uplift in base costs as forecast in the BOM, the casing ( a friend just started out with a Audio Device Chassis / Case producing business has offered to produce my case), and a Labour cost, not yet supplied, but should be easy to forecast, as this will be the second model produced by the designer/builder. 

Off the shelf, might get a better price, but does not guarantee after-sales support.

In the UK, after 12 months, I would be on my own if having bought retail off the shelf. My audio equipment commission builds are designed/built by Audio EE's who I have cultivated friendships with since the 90's and 00's,  and I still have items produced today from their designs.

If I went down the retail route, I would be on my own with little support and close to £100K+ out of pocket to achieve an end sound I am able to create. 

My PS Audio PWT had very recently developed a fault, which I soon learned I was not supported by PSA. The PSA forum assisted with helping me get through the fault and produce a repair that is working. I haven't got that with Amplification built for me in the 90's, 00's and 20's.  

Reviews. I was curious about GanFet sonic differences until reviews did a comparison. I’ve demoed AGD and liked the Grand Vivace, the Audions were very good.

Other amp topographies also sound different, so I’m not surprised that Class D does also. Since the OP is moving from SET tube warmth, establish tube designers know deeply about tube sound when designing their non-tube amps. I’m assuming that the OP still wants that warmth.

Well I've got a Class D Audio GaN 6.0 coming my way.  $700 lightly used seemed the perfect price to dip my toe into this arena.  I'll post some impressions here in a week or two.  

https://classdaudio.com/product/premium-gan-6-0-silver/

I STRONGLY recommend the referenced  latest generation Class D Audio amps  Especially if you want to listen at realistic volume levels. They completely deliver as advertised.