Decware has been around for many years and they have always played in the HE world. I owned their Torii IV and later ZMA while I was becoming a tube guy. I don't have efficient speakers so I needed their push pull models.
Zu, Tekton, and Klipsch are very common speaker partners for their gear. I'd say Decware makes a very well built and attractive product, their pricing is very fair, and customer service is outstanding. I'm no longer a customer, but I recommend them if SET amps and HE speakers are what you are looking for.