Your Fosgate has 60db of gain. Enough for most of the popular MC carts.
Former owner of one for 12 years- great phonostage. Get a different cart for a different "sound" Also a longtime VPI Classic user
If you're seeking dramatic improvement dump the VPI/Fosgate and open the wallet wider.
You will hear less tube rush at high volume with SUT-MM setting if you're the type that listens for it.
Needless expense, IMO.