Recommended a highly resolving cartridge

I meant to include in my post-

while the Hagerman Trumpet get rave reviews, it's often mentioned while it punches above it's price point, its still a $1500 unit-wasn't too long ago it  was under $1K?

With the cartridge level you're at, next level phono stage fits into the equation for maxing out performance.

@tablejockey This came across my mind. I suspect that the emphasized mids from the Hagerman is making the Grado not a good match anymore. SO... I could just move on from the Grado or keep it and invest in an alternate phono stage. My hesitation is that I can't see a phono stage that will beat the Hagerman by much if at all. Generally folks that suggest moving on from the Hagerman have never listened to what it does especially with primo old tubes (and linear power supply which I've added). I'd love to hear from someone that has first hand experience of the Hagerman and a pricier option and what they consider to be a worthy step up if anything. 

As an alternative to the ART20 I've bookmarked a Hana Red or a Lyra Kleos

"My hesitation is that I can't see a phono stage that will beat the Hagerman by much if at all."

In this hobby unfortunately, that's wishful thinking.

@tablejockey It very likely is, but I'm awaiting informed data which I've yet to see.