All the (good) companies that make the Purifi based amps use the same bones.....well, except the chassis.....which are all plain......but you might like one over the other. The insides are all the same.....1200 watt Hypex power supply, Purifi module and input board all made almost identical to each other using Sparko labs regs and a choice of input op amps. This is all I need to make a super thang.....because I change everything that matters. VTV is cheapest in the US, offers a 30 day money back on their amps and has free shipping. They can also do some custom stuff that no one else is currently offering. I just talked to them today. How about a 3000 watt power supply for a stereo or mono block? They can do this. Probably kick it up a notch......bigger power supplies are generally a good thing!
https://www.hypex.nl/product/smps3ka400/32
https://www.hypex.nl/product/smps3ka400/32