At the moment, I have exactly 6 working Apple CRTs with the DB-15 connector, so can just make it work.
I do have a bunch of the adapters, but want to at least make it as era-appropriate as I can.
I have two of the standard Mac II video cards, two "Apple high resolution resolution video cards" and two Radius 24x series cards. All of those cards are capable of outputting 640x480 but differ in their color depth. I think the standard II card can only do 4 bit color, while the Radius cards can do 24 bit. Naturally, they'll get paired with the best monitors.
And, the set-up is only going to be temporary since I'll have to borrow cards from several computers to get it there! Granted, my Quadras and IIci don't need cards, but I do like having the ability to run better than the on-board video on them. If I dig, I should have enough VRAM SIMMs to max out one Quadra...
I understand the Mac II being your professor's pride and joy. They were not inexpensive systems at the time, and were pretty darn fast too(especially compared to the SE that came out at the same time).
I'm on the hunt now for a IIfx...