Large listening room

Jimmy, your room is a good size, but not really that large. Regardless, you are NOT trying to fill the whole room with sound, right? I assume you will try and keep your listening distance to 10 or 12 feet? For me, the value of a large room is that you reduce problematic first reflections off the walls. You might tell us how you hope to set up the orientation of the system to the room and how far off the walls you can place your speakers. I had some 805’s and those speakers can put out some serious decibels. You have the right amount of watts to drive them right and a subwoofer to boot. You might be in pretty good shape. I would set up the 805’s with a good 4 or 5 ‘ clearance from side and front walls and give it a whirl. Best of luck!