About the Vifa DX25, I think it sounds very nice in hifi speakers designed for use under 115dB SPL. It has a wide surround and can handle some excursion, so it can be safely crossed over pretty low for a 1" dome tweeter. That characteristic also makes it respond well to first-order networks. Its response curve is ruler flat and goes waaaaay up there on the top end. So it is perfect for a studio monitor type speaker. The three π is really best suited to be a studio monitor, similar to a Studio two π with premium components. It sounds very nice.

Compression horns have other advantages. They're horns, so you can set directivity. They're efficient, so you can use them in powerful speakers that get loud. Those are very attractive features too, and important in many designs. I use them in a lot of my systems.