Im trying to upgrade my speakers on my porch. I have an X4000 and am looking at these two speakers: http://www.kicker.com/kb6000
I have a set of those for our back deck. They're still in the box waiting for me to put them up on the wall. Which won't happen until the weather sucks less, certainly not until the ice clears off the mostly north-facing patio stones.
I went with those due to mounting preferences. IIRC, the yamaha would have been problematic to mount horizontally and then tilt downward toward listeners.