Nice looking room, nice kit, but until you provide some attention to room acoustics, you'll never approach a small fraction of what either setup is capable. Properly done and integrated into the room design, acoustical treatments aren't just ugly slabs hanging from the wall.
That said, I'd go with floorstanders because most stand mounts are voiced for near field listening in a small room, and that would be doubly problematic in your room both due to size and the very ... lively ... acoustics.