Need recommendations for a Step Up Transformer for Denon 103


I have a Denon 103 that needs a SUT. I'm told that the Denon performs best when loaded with 470ohms. I'm new to the world of SUTs and would appreciate recommendations on a SUT that can achieve this specific loading or one close to it. My budgiet is ~$500 but preferably less. I've heard good things about the Ortofon ST-7, Parks Audio Budgie SUT, and the Rothwell MCL...
dptv
Any of the Denon SUT's will work fine. I have one in use with a 103R. Along with a Bellari and a Quicksilver plus three others (Sony T10 and two custom-built with mic transformers). Loading is a matter of personal preference for mc's - experiment and listen!
This was designed, with your cart in mind: http://www.auditorium-23.de/Accessories/Transformers.html I have one and it works very nicely, with my Denon(ancient/classic) 103D and Dynavector 17D3 carts. https://6moons.com/audioreviews/auditorium23/23_3.html Bought it from: https://donbetteraudio.com/accessories/  Used are available and in your price range.
Parks Audio Budgie is what I used when having an SUT in my system. It is VERY good. Dynamic & smooth. It uses CineMag transformers, which is what Bob uses in his more expensive SUT's.