The Zaph driver is pretty solid. The mini Phils I have are a variation of the smaller Zaph 2-way design, but using the Raal up top. The Zaph plays high enough for a good cross.
Been a while since I had them down to listen to them as mains, but they impressed me when I plugged them in that way upon first receiving them.
Perhaps the biggest point to note with that small a driver is that bass will be somewhat wanting. If paired with a larger woofer in a 3-way design or a good Sub, I think the Zaph is a great driver, but by 55 Hz, it is pretty well done in the sealed cabinet. I think ported you can tease it into the mid-upper 40s.
I have 1 pair of Mini Phils, and 2-more pair of raw Zaph Mids waiting for a design.