the monolith is definitely more impressive than i anticipated it would be. the Q350 has it's flaws but the majority of the EQ it needs is in the 1khz and below region which is right in the wheelhouse of most capable room correction like DIRAC, ARC etc.
i tend to judge center speaker options against the RC263 as a reference and the Q350, for me, has an advantage there. not huge but it exists. the in-room anticipated for the monolith is impressive though for its price. my only real concerns are the nearly 2-ohm low point point. it's narrow where it occurs thankfully but that is a strain for some AVR's.