Looking to move to a Tube Integrated setup

Agreed.  I enjoy both tubed and solid state systems, so no personal bias in that regard.

After looking at those measurements, I can't imagine a tube amp being happy driving this speakers incredibly low impedance.

Nothing wrong with wanting to try tubes--just pair it up with the right speaker.  The Moab Be is not that speaker IMO.  

AGAIN, read the review/measurements.  It is NOT a 4 ohm speaker.  At some frequencies it is just clearing 1 ohm!  

Amps need to control speakers, not the other way around.  If you pair a tubed amp with this speaker, the Moab will be exerting its will on the amp with very unpredictable results.  Nonlinear frequency response will be just one of those problems.

I don't disagree with that.  Measurements might help to predict certain aspects of music reproduction, but in the end the true test is your ears and the enjoyment you derive from your system.  Good luck on achieving your goals.

In fact I did but your description was a bit ambiguous. But that is not the point.

Much of the low impedance occurred with the bass drivers well below the crossover frequency. I suspect the bass drivers are very similar if not the same drivers.

In all likelihood  the measurements would in fact look similar when it comes to impedance and almost certainly it will dip below the nominal 4 ohm rating.

Didn’t mean to debate the point with you and just wanted to pass on some important considerations as you look for a new amp.