If the 271 is an 16+4 channel post processor to the Trinnov... I wonder if you have an 24 or 32-channel Trinnov if you can use the extra channels for non Meridian speakers and subs?

To have the 271 processor do a base layer of DSP speakers and then use the extra channels on the Trinnov for height/Atmos and subs seems like a good solution.