I have a AN UK S-3 Step-up. I bought it used for USD$1300. I think it sounds great but did not compare it to other SUTs. I am already down the ANUK rabbit hole with a Tonmeister Silver Phono and SpeHE speakers.
At first it was noisy as hell, but after fixing my ground issues, it's been very quiet.
OCD Mikey the Hifi Guy lives in my area and came by my place to listen to my AN system (Tonmeister Silver Phono, SpeHEs, interconnects and SpX cables). Really nice guy and much more serious and focused than his youtube persona.