I am building a system for my step daughter. The original plan was a pair of X-LS Encores for L/R mains, an X-CS Encore for center then later on either a second pair of X-LS Encores or a pair of AV-1RS's for surrounds.
In the meantime she has moved and has a much larger living room so I decided to switch gears a little and go with three X-CS Encores (with upgraded and point to point wired crossovers) for L/C/R duties and ordered those kits from Danny yesterday.
This morning I got to thinking about rear surround options and remembered the X-Omni. I hadn't given the X-Omni any real consideration in the past because somehow I got the impression it used the classic tweeter. Now that I know better I'm going to give them a try.
At this point I'm not saying my step-daughter will get them as her surrounds. I haven't seen any pictures or dimensions of her living room yet (she lives in Portland, OR) so I don't even know if they will work. Then I have my own system with X-LS & X-CS Encores up front that these will mate with perfectly

. However, in my system there is a good chance I would use the X-Omni's as L/R mains and move the X-LS Encores to surround duties.
Even if I decided to keep the X-Omni's initially, she may get them down the road a bit because I have my sites set on a pair of the LGK MMTMM OB speakers mated to a pair of 12" OB dual driver servo subs for myself (my wife claimed the N3's as hers).
Mike