I would try to listen to as many SUTs as you can - at shops or via trial periods. SUTs are very personal preferences IMHO. Also make sure your SUT is actually 10x, 15x, 20x, etc. Sometimes they are not. I had to return a Sky30 because of it. Using a Hashimoto now.
Bobs Device SKY 20 or A23 (Denon) SUT for my Charisma 103 cart
I will be adding a Step Up device to my system soon. It's an Amadeus table, Charisma 103, which has ruby cantilever, but nearly identical specs to a standard Denon 103. These will feed my Croft phono integrated driving Harbeth P3's. I'm leaning toward the SKY 20, but does anyone have any experience here. I'm a little surprised these units haven't been compared anywhere that I can find. Art Dudley did a write up on the Sky, but in the article he made reference only to A23 Homage SUT. Cheers -Don