I would say it's 70% room / 30% set up. The room is a wide open space with little boundary reinforcement, it may be better suited to an omnidirectional radiator. The back wall (being a hard flat surface) won't help any with the soundstage. Actually, every surface being hard and flat isn't helping. Lastly, I think your seating position may be too close to the back wall.
I really wanted to post to say that if you laid out this kind of money at one dealer, they had better get over to your place and help you find a position you are happy with. It's one thing for a dealer to sell you a $1000 pair of speakers and say "have fun"; but when you buy a precision instrument like this system, the dealer has a responsibility to make sure it is performing to your expectations.
I really wanted to post to say that if you laid out this kind of money at one dealer, they had better get over to your place and help you find a position you are happy with. It's one thing for a dealer to sell you a $1000 pair of speakers and say "have fun"; but when you buy a precision instrument like this system, the dealer has a responsibility to make sure it is performing to your expectations.