Best surround speakers for Montis and stage x?

i am curious as to what some of you are using for surround speakers and getting excellent results with? i am still playing with the positioning of my montis and recently ordered a stage x. i owned the fx2s before when i owned a motif x and i thought the fx2s weren't as 'full sounding' and got lost at times when the montis started to scream. i know the efx is probably my best bet, but what else is there? are my options only the fx2s and the efx as far as wall mountable surrounds are concerned? i thought about the motion SLM line, but i am not sure.

I use Motion 15's and in-ceiling EM-R's along with my Theos and Stage for a 7.1.4 Atmos setup. Works well!