As you describe, multiple arms on your best table is the choice I would make. Wanting/needing a dust cover is a primary limiting factor for me, you didn’t mention that.
I don’t have the space for more than 1 large TT, I keep a spare TT in storage downstairs, so that I will never be without a TT if the main one is down for ......., you don’t have to part with all the others permanently. Removable headshell on the spare TT’s arm makes it easier to get back in action.
............................
for other’s following, considering more than 1 (arm/tt), a few comments:
Once I got my JVC TT with 2 arms there’s no going back.1 arm with mono cartridge ready to go, 1 stereo ready to go, effortlessly switch back and forth during a listening session. A treat for Jazz, Big Bands ... a lot of great recordings were made before LP’s went stereo in 1958.
For versatility this 3 arm TT appealed to me, it’s attached dust cover, it’s innovative rotating arm boards, it’s compactness. It turned out to be too compact to fit my 12.5" long arm. Those 70mm 7 layer plinths are terrific.
https://www.ebay.com/itm/Transcription-turntable-Denon-DP-3000-tonearms-Grace-960-Grace-565-Denon-DA... I might have changed the spinner as others mentioned, get quartz locked, people say the DP80 a great choice.
Change/compare arms/cartridges for the rest of your life. Note: the clearances inside the dust cover when closed restrict which arms will fit, i.e. my 12.5" Blackbird will NOT fit. With the dust cover removed, almost any arm would fit. Note: only one of the 3 existing arms has anti-skate.
Dust Cover is a must for me. That attached, stay at any vertical position dust cover would be a great feature (3 hinges I noticed). My 2 arm deck’s removable cover is big, heavy, I have to carefully lift off, put somewhere without damage, carefully put back in place. Every movement is potential for disaster, and scuff marks will accumulate even with caution.
The innovative rotatable circular arm boards allow repositioning for any arm length without drilling new holes, sliding mounts ...(restricted by what arm fits inside the cover). However, the diameter of an arm’s base plate might make the base plate project a bit past the edge of the circle’s edge, just a visual consideration.
.........................................
I am keeping my eye out for a rare JVC-Victor 3 arm plinth CL-P3, if anybody sees one, let me know please.