Speaker Selection with "difficult" room

Yes. Sorry.
Budget is $5000 for speakers.
Floorstanding speaker.
Now have Onkyo TX-8211 integrated amp. but this can change if needed and budget as well.
Music is mostly alternative, rock and jazz.
Have listened to B&W CM-90 already but not sure if that is an underwhelming choice for this space.
Thank you.

Thank you.

A few thoughts....

You might want to go with a speaker with a soft dome tweeter (ie., a slightly rolled off top end). It will be tough for you to control the high frequencies in that room, so anything 'brightish' will be hard on the ears.

You definitely need a floor stander to fill the room, but I'd be inclined to re-look at the Onkyo, you'll need a tight grip on the bottom end to keep it in check. So maybe something with some really high quality power (100wpc+), and a fairly efficient speaker.

Tons of choices on specific brands, really a personal preference.

Will the speakers fire down the length of the room or across the width of the room? How far will you be sitting from your speakers? How loud do you listen?

I'm with Plato.

Anthem, TacT, Deqx, Lingdorf, or Audyssey are your main options for room correction electronics. Not neccessarily audiophile approved, but probably your best call.

You could also go with bass only correction from Velodyne or SVS/Audyssey if you're willing to go to a subwoofer. You'll just have to find a speaker with the right top end for all those reflective surfaces in your room.

Good Luck,

Marty