Yes, extremely happy. They certainly load the room differently, but in a good way. I guess a better way to describe it is that they don't OVER load the room, but still provide bass slam when it's called for. But the biggest advantage is the bass articulation and detail that is seldom heard with box bass.
Beautiful system w/ very fine equipment selection, and nicely displayed. Your tube amp is wonderful.
Looked your speakers up and they seem to be priced right. I've eyed the Jamo R909 open baffle speakers for years. The OX3 would probably be a good match w/ my Mystere IA11 40 wpc tube integrated amp. Or even the M3 w/o a powered sub. Something for me to consider.