"Actually, I have been using the same chemistry for nearly three years, and feel it's time to fine-tune things a bit."
You have been given lots of good advice. May I ask what chemistry you have been using for the last 3 years, and just what needs fine tuning? Your choice of papers is good. Is there a specific problem, or have you seen some results you envy?
Rather than dropping two notches down to discuss politics or religion, I will only go down one notch and discuss opinion. I personally keep 5 different papers in the drawer, but only use one developer. After 20 years of searching for that magic bullet, I have settled on Dektol for 2 minutes at 68 degrees. If I want a different look, I try another paper, and I usually get it. I won't go back to Amidol or boutique developers, as Dektol always does it for me. I, and apparently the people who buy my work, love the combination of Kodak Polymax Fine Art in Dektol. I think you will like it too.
PS: Tone it for 3 minutes in Selenium 1:9 and wash it for an hour.