Having two enlargers is really useful. You can set up each enlarger for a different favourite format or workflow, or you can use one for flashing and the other for exposure, or you can set up one for negatives that benefit from a higher contrast light source and the other for negatives that benefit from a diffused light source or ....

And the advantage of the 23C II is that it will print up to 6 x 9 (2.25" x 3.25"), so it and the 45MCRX will be able to both cover almost all the medium format choices.

I like the Beseler 67 - I've owned one since the 1970s, and if my darkroom was permanent and had the space, I would have it set up with my Omega D6. I just think that the 23C II and 45MCRX duo is the most effective. I believe as well that they share the same lens boards.