Focusing on Getting Superior Sound from your LPs:
Cartridges (plural), Take advantage of your removable headshell arm. Each it's own Headshell with open sides for access to wires, holding nuts, etc, finger lift, and importantly azimuth adjustment at the headshell
just as example for function:
https://www.ebay.com/itm/293416434592wood one
https://www.ebay.com/itm/223518113378Existing fine elliptical DL103D; new advanced stylus stereo; new elliptical Mono. Use these with your existing single arm TT, for a while, recalibrate VTF and Anti-Skate each change.
then:
Think Long: even though you have a great single arm TT, I encourage you to think now about a two arm TT. I got there by accident, then help here, I sure am glad I did. I went to 3 arms (see in my System Photos posted here), but 2 arms makes a world of difference.
The greatest thing for me is having a Mono Arm and a Stereo Arm balanced, ready to go: switch within seconds from Stereo to Mono in a listening session. My 3rd arm is MM so I don't needlessly wear out my primary MC with fixed stylus testing LP's for sale.
I wanted a longer arm, that's how I ended up with my setup.
Space needed for larger plinth.
Alignment skills (yours or a friend) needed to take advantage of it.
Tools
Method of selecting which arm. Your McIntosh Phono Preamp, great as it is, only has 1 input. You could add something with several inputs use it's MM Pass to choose what to send to your existing Phono Preamp
i.e the SUT I chose for 3 inputs, Fidelity Research FRT-4
https://www.ebay.com/itm/124558472024entre et-100 has 3 inputs and MM Pass
https://www.ebay.com/sch/i.html?_from=R40&_nkw=entre+et-100&_sacat=0&LH_TitleDesc=0&...or 2 inputs, this Denon
https://www.ebay.com/itm/164939828820No matter what, any Phono Preamp you (or anyone) might try, I highly encourage having the right to return it.