I have various SUTs, special Headamps, High Gaing MC phono stages (with adjustable gain), MC phono stage with built-in SUT is the quietest of them all ...
What is really special is Current-Injection type of MC phono which I also have (for low impedance MC).
I like simplicity, less wires, I would like to use just one box instead of two.
But if you like different flavors you must try what you like in your system! Don’t ask others what you will like.
If you want to try a SUT there are so many top quality SUTs from the Japanese manufacturers, inexpensive classics from the 70’s, 80’s.
If your cart is low impedance, try Current-Injection type of the MC phono stage instead of a SUTs