Koetsu Platinium together with My Sonic Lab 303 SU

Hi i would like to hear if anyone has tried the combination with a Koetsu: Platinium series and a My Sonic Lab step up transformer 303, do they match together. Which SUT is the best for the Koetsu Platinium in general besides their own, which i beleave is out of produktion.
I have the Koetsu running into a Aesthetix: Eclipse but wants a SUT to have lower noise floor because of the low output from the Koetsu.
Let me hear your expiriences so i can find the right SUT.
Thanks.