My LCR is not wall-mounted. As I understand it, the standard bracket doesn't include a swivel. You would need a third-party bracket (I'm using Axiom FMB for my side surrounds and plan to retain those brackets for my SL's when I install them soon) to allow some sort of toe-in adjustment.

My space is about 17'x23' with 8' ceilings, but the openings onto other spaces are limited (standard doorway into the kitchen and another into the hall). I use an LFM-1 with very good results. Some folks would probably go for an extra sub.

I'm using a 7500 with my BLS's and LCR, but I also think the 7125 would do a very good job with them.