Cc: I'd expect the Shure to be more highly compliant than the Denon, so I'd tend to put the Shure on the Denon and the Denon on the Technics.
Oh, and mind you that the output spec style of the Denon is different (also a modulation velocity of 5 cm/s, but lateral/mono in modulation only - whereas Shure typically measured in 45°/stereo modulation), so translated to the same measument style as used by Shure the output spec of the Denon would rise to ca. 2.25 mV - not quite as loud as the Shure (ca. -2.5 dB), but not as far apart as it would seem at the first glance.
And the input sensitivities of both the Marantz and the McIntosh are pretty much the same (1.8 compared to 2 mV would translate to a difference of ca. 0.9 dB only -> insignificant) and should be high enough for both the Denon and the Shure - in combination with records with a rather conservative/low recording level, you might not be able to access the full output power of either the Marantz or the McIntosh, though, but in practice that should rarely be necessary anyway. One could argue, that it might seem wiser to connect the table with the Denon to the Marantz, though, in order to reduce the output level difference to the Shure rather than to further increase it.
Greetings from Munich!
Manfred / lini