The Eaton TrueTrac’s have had issues with vibrations and noise. Some are worse than others, but it’s a result of the 4 gear design IMO. I wasn’t convinced until I started running mine, but there is some additional gear noise from it. Cass even swapped the ring and pinion out for me because he thought it might be the R&P, but I’m pretty convinced at this point it’s the Eaton. I don’t think anything is “wrong” with it, but I would get the 6 gear version if I had it to do over.
Why do you want rid of the Sure Grip? Other than the need for a friction modifier they’re dead simple and have a good feel.
