But now I am leaning further away from the QS4s because they are so much more expensive and still not ideal when the couch is against the wall.

It sounds like people generally recommend that monopole surround speakers face each other rather than face forward; this is now what concerns me the most. If both the T2 and the W2 can only fire forward, will they produce a good but somewhat diffuse surround effect, or will they go unnoticed?

If it is the latter, is it better to just get M2s and have them face each other?