In an ideal world (and budget), 4 x DSP320.2s would be ideal: that is, if they would fit between my exposed beams, and that I didn't face exactly the same problem on routing their associated cabling back to my Meridian 258.

Not an Actor, nor married to Jamie-Lee Curtis.

#1: DSP5200SE|DSW.2|218|210|506.2|504
#2: Prime/PSU|SOtM sMS-200 Mini NEO SE|Focal Stellia