I'm building a new home with a dedicated theater included. I don't have a ton of space, so the room ended up roughly 11x18. I plan on using a 6.1 setup for speakers. (Not included on the picture is a sub that I will add to the system.) I have a few concerns about how it is layed out.

1. My rear couch will be positioned roughly a foot from the side and rear walls (please view the included pic.) Will this be a problem if I choose something like QS4's for surround/rear speakers?

2. The side speaker on the left side of the picture will be placed on a 12" wall next to a cabinet. With this setup, it won't have a wall directly to one side of the speaker. Will this pose much of a problem?

If it would turn out better, I'm not totally against using a in-ceiling or in-wall setup, but I'd prefer not to. How do you think this will work out? Thanks in advance for any advice I can get.