Well, if you are happy with the 24-70 F2.8, then the obvious answer would be the Z 24-70 F2.8. I have the 24-70 F4, and it's a great lens. It's very sharp, very fast AF and well built. The F 2.8 version should have and edge in AF because of the larger max aperture, and is reputed to be a little sharper than the F4 version. The only issue I have with it is that I would like a little more reach. I don't have a 70-200, and don't have enough need for it to justify the expense, so every now and then I would like a little more reach with it.
As to the macro, the Z 105 micro is an excellent macro lens. Yes, it's shorter than the 200, but there isn't a direct Z mount replacement. To be honest, for macro work, I would have no issue using the lens you have with the FTZ. I shoot 98% of my macro work in manual focus and don't really think there would be much to be gained with a native mount macro. I have tried autofocus for macro work using the Z8, and found that it is much better at it than any previous camera I've used. I still haven't been convinced it would be a good idea to switch to AF for macro. Besides, the autofocus will work fine using the adapter, although being F4, the 105 micro will have an advantage.
