I would suggest placing the speakers as symmetrically as possible, so put the LCR all near the TV, and shift the surrounds around so that they are centered on the corner of the room. Your layout obviously forces some compromises, but you can make it work. Even a bad surround setup is better than TV speakers, IMO.
On the wall plate, you might entertain the thought of just getting a blank faceplate, drilling a hole in the middle, and running the cable direct to the speaker. You can always get a faceplate with binding posts later if you desire. I personally would not use any kind of spring-tensioned connector.
Do you know what speakers you're going to be using?
And Google Sketchup is a good program for drawing room layouts, freeware.
On the wall plate, you might entertain the thought of just getting a blank faceplate, drilling a hole in the middle, and running the cable direct to the speaker. You can always get a faceplate with binding posts later if you desire. I personally would not use any kind of spring-tensioned connector.
Do you know what speakers you're going to be using?
And Google Sketchup is a good program for drawing room layouts, freeware.