I'm building a 5.1 system around my Synergy KSF 8.5. My question is whether to use matching S-2 surrounds. The only location I have is to wall mount them nearly in the corners of the room directed towards the listener seated against a "back" wall.  I am concerned that the design of these speakers, (90º X 90º XT Tractrix® Horns in a WDST configuration) will mean that one of the horns will be nearly facing (@45deg) the back wall which will reflect the sound and may impact the sound quality. Would I be better off using a more directional speaker like the Icon XB10 as a surround for this reason? The S-2 certainaly look better as wall mounted speakers!!!

Room Layout;  

                 F               C              F

                                                                                              S= Surround Location     F=Front

|S__________________L__________________S|                        L= Listener                     C=Center

I've also read that at a minimum, the center should be of the same series as the fronts, so I was considering the C-2 although the cabinetry is not nearly as nice as the Icon Series. Is maintaining the same series that important given an equal or higher quality speaker from the Icon series for example?

Thank you. I'm very much a newbie at this and appreciate any advice. 

Center Channel:  

If you are into movies a close match and better yet the same speaker as the L & R is very important.

I have spent lots of time & money tring to make what is heritage to heritage match academy with La Scalas work but it would have been cheeper, easier, and higher quality if there was enough room for another La Scala etc. 

Surround:

I have a small room and the same corner issue with the same type design surround, RS-7, but worse since one is a corner, rear wall and side wall, and the other on the rear wall no corner. 

Corner placement does not seem to a big issue, I have stucco walls open floor joist that help break up the reflection.  If you do have a hotter wall you may have to some material to absorb the reflection.

Timbre matching can be an annoying, and expensive issue, I would stay with the matching S-2.