My suggestion would be this: If you presently have the speakers along the 16' wall move them to the 32' wall, or vice-versa. This will definitely affect the bass balance and imaging so it will provide you with a clear impression of which placement works best in that particular room.
Sometimes you can put the speakers across a corner (with the corner in the center of the two speakers and get good results but I would try my first suggestion before trying the speakers across a corner.
Rooms can make all the difference between WOW!! and ho-hum, as you are learning. And if you don't have a good AC power conditioner or power regenerator in your system, I'd suggest that you look into getting one.
Sometimes you can put the speakers across a corner (with the corner in the center of the two speakers and get good results but I would try my first suggestion before trying the speakers across a corner.
Rooms can make all the difference between WOW!! and ho-hum, as you are learning. And if you don't have a good AC power conditioner or power regenerator in your system, I'd suggest that you look into getting one.