Try the Tron Syren (www.tron-electric.com). Tron amps are hand made by Graham Tricker (and only him!) in the UK. His tube amps are of the highest quality regardless of price. However, as they are made in tiny numbers, most people haven't heard of them let alone heard one in the flesh. They are designed for the ultimate in performance, regardless of price and use bespoke components and specially designed circuits with short signal paths. I have just bought his own demo Meteor preamp (the Syren predecessor) and I have heard the Syren at length. It sounds like music with all the grain removed -remarkable. If you're in the US, he is prepared to sell you one on approval, although I doubt you'll want to return it.
Alternatively, you could buy from his website his second hand Nucleus line preamp and Nucleus phono stage (circa 1999) which is also excellent.
Alternatively, you could buy from his website his second hand Nucleus line preamp and Nucleus phono stage (circa 1999) which is also excellent.