OK, here is your plan (to scale with the exception of your furniture)
Now, my question is, why bother with a corner setup...unless there is something I am missing? You can have a pretty "ideal" layout with your room. I had assumed the fireplace was on the short wall which would have been tough, but you should be able to work with this room as it is. Set up your room lengthwise, you shouldn't have any problems. The only question is surround placement, depending on the location of your couch and the doorways. You can go for sidewall mounted or back wall mounted. Either is acceptable, at least according to Dolby. The other issue may be the opening in the lower right corner...to compensate for this you may find you have to bump up the level of your front right speaker a few dB's higher. I had a similar setup in my old apartment and had to do the same. Here's what I would do if it was my room...but let me know if there is something I am missing.
