Biggest impact: moving from integrated to separates

I am slowly moving to separates from my Cronus Magnum integrated amp. So far, I’ve upgraded the Phono stage to a Pass Labs XP-15. I’m now looking for the next upgrade. I will need an amp and a line stage preamp. My budget is @ $3K and I am looking for the biggest bang for the buck. Which upgrade should come next? I would like anything I upgrade to have balanced connections (for linestage both ins and outs.)

thanks