Jewelsedge

I am considering purchasing a pair of RS-3's for my rear surrounds.....what is the recommended height when mounting these speakers (in relation to listening height)...I am thinking of mounting these vertically on the side walls in the rear, facing each other across the room. Is this the best, or should I mount them high on the rear wall and angle them down (keeping them in the horizontal position)??? Any thoughts, suggestions is appreciated!!!! Joe

Anyone ever mount these speakers lengthwise on the side walls....I am trying to decide if this would impact sound ....I only have room to mount the speakers on the side walls in the rear...and I would have to mount them vertically on the wall (18inches up and down, instead of side to side)....any thoughts??? (I haven't bought the speakers yet...so I can't just try it...and I don't want to buy them if it's not a recommended mounting method)