Ultimately it will depend on how it interacts with your cartridge and phono pre. In my case the silks outperformed the S&B's. Unfortunately specs and reviews rarely tell the whole story of how an sut will perform in a given system. It would be nice if you could get an evaluation period when buying some of the higher priced step ups. Bottle Head amps are supposedly going to offer an SUT from magnaquest that should be very good and priced reasonable.
What Step-up transformers are best value?
I have recently bought a VDH Black Beauty cartridge. It needs top-flight SUTs. I'm currently using Silks, which are very good. I have also tried the S&B TX103s (lent by a good friend), and they are noticeably better. Their price, however, is prohibitive (£1400). Anyone know of any serious bargains out there, which are up there with the Tx103s?