You will not be disappointed with an AI Modulus. I am very happy with my experience and the Clearaudio Virtuoso/Shibata. At 3.2mv output I can't get the volume much past 12:00. Unless this unit has the John Curl MC Gold boards then MC only.
The output of a Rega Planar 3 may be a little high at 6.8-7.2mv as you can see it is not on the list. Just means you may only get 1-5 clicks at the dual volume potentiometers from 0. About 9:00 on the volume controls. Maybe your ears can take it if your a rocker? wouldn't want to listen to this one at eelehven. Deaf soon to be, aren't we all....
Further reading regarding cartridge compliance from the AI site:
http://www.audibleillusions.com/technical/technical-bulletin2/