@dbarila fwiw my system is very similar to yours Grado Gold 2 w/8mz stylus -> U-Turn -> Schiit Mani -> Kenwood KR 3130 -> Elac Debt 6.2 and a Squeaky Clean RCM and my generally thoughts around upgrades right now are just as
@AnthonyI said: hold until I can do some things that REALLY make a difference (unless something breaks). I figure that I'll start the process towards an endgame system in a few years and at that point I'll start at the front of the chain.
In terms of what you listed, the 8mz upgrade for me was great, but it was out of necessity after my other stylus broke. An upgrade to a better RCM is on my mind too, as are upgrading some speaker cables from my cheapy Amazon ones. But right now I'm not in a rush to make any changes.