The AirTight ATH-2 Reference is a keeper for me. Love the sound and punch from it !Agree with above. I've tried over a dozen different SUTs in just the last 2 - 3 yrs and some ok and others GREAT. ANJ-Kondo have been very good but Audio Note UK not anywhere the sound quality of ANJ. One of my favorites was S.A. Labs (out of Russia) had 3 different units my favorite was their K-25. Beautiful sounding. Koetsu was another recent purchase and again just wonderful. Tried a MSL SUT with my MSL Sig Platinum and while good an Airtight worked much better. Actually the Airtight is now a keeper. Has worked well with several different cartridges.
Lots of choices ....good luck in your own quest.
/ Jk