In fairness, the qualities that allow the QX326 to have
pattern control down to 400Hz also minimize the LF lobing directly below them that you'd see from a typical
trap box. I use the Danley SH series a lot as mains in high schools for this same reason albeit a different cabinet design. Not so much because the rooms are huge and I need
pattern control and max SPL to carry 400ft, but because that
pattern control reduces
feedback potential on-stage -- especially with every architect's favorite
stage design: "the poke", which parks 12' of
apron smack dab below the clusters where everyone wants to put their
boundary mic's.
As far as EAW slipping over the last several years, the rumors are true. They used to be a top tier company but their manufacturing quality plummeted when they moved production overseas. They've been on the rebound the last few years but their reputation hasn't yet fully recovered. I can't say I've heard any of their newer products except Anya for 45 minutes of a Weird Al concert because EAW pulled out of doing a demo room at InfoComm a few years ago. There is no better real estate in our industry to demo speakers to contractors, consultants, and potential customers than InfoComm -- and yet EAW has made themselves suspiciously absent. Not to say you couldn't do worse or that you'd even notice anything wrong with the few cabinets that would be involved in this, but it pales in comparison to the consistency, production quality, and support they used to be able to provide.
Without knowing more about the room though, I wouldn't recommend the QX326 or any other
speaker model for that reason. But off of having designed a few similar rooms recently that were in the wider area of 50' deep x 100' wide for their seating area, I can say that front fills are probably important in covering the first few rows at center. Also for pulling the sound
image down to
ground level where it's more natural so the performer 10' in front of you doesn't sound like they're shouting at you from the rafters. I can also say you probably want either distributed delays or double-stacked clusters where you can
gain down the front seating areas from the back. Otherwise the people in the front will get flamed out.
Speaker selection aside, in these kinds of the rooms it is particularly important to do the modeling and verify coverage at different frequency bands. Getting the speakers located at the correct height and aimed at exact tilt/pan required to
cover effectively to center as well as out to the far left/right and the back rows is critical. It doesn't matter how top-of-the-line your speakers of choice are if they don't get installed at the right spots.
Lastly, re: soliciting
feedback from listeners on the internet. It's a crap shoot. There are so many systems out there than sound awful because it's the right product but poorly tuned. Also a lot of listeners who aren't trained in what to listen for and how to focus in on specific, relevant behaviors of a cabinet while also purposefully ignoring spurious information like the
effect from the room
acoustics or of overly compressed source material. Bose has made an empire on presenting inaccurate sonic information to listeners' ears but listeners feel titillated at hearing something differently than they've ever heard it before and so they
drop thousands of dollars on home theaters that accentuate the highs and lows while trashing the mids. When it comes to speakers, you really need to trust the person whose
feedback you're soliciting.