What follows is just speculation, as I have not heard those speakers myself. But...
If I lived in Europe, I'd first check out all the great European manufacturers: ADAM, Focal, Dynaudio, Genelec and others. When comparing prices, keep in mind that most of those are powered monitors that you won't need to buy an amplifier for, and which employ active crossovers, which most people prefer for reference monitors.
I'm always
su****ious wary when manufacturers make big claims that smell of hyperbole. CEntrance uses the phrase "mastering quality sound". Mastering engineers don't use 4" speakers (most would consider 8" speakers too small).
Mike's probably right about the concentric-driver concept. At least, it sounds reasonable on paper. But the only speakers I've actually heard with that design were Tannoys, and they're nothing special, so I remain unconvinced.
As I warned above, this is speculation on my part. But if I was doing the research for myself, I'd say hearing these speakers would be an absolute prerequisite before buying.
EDIT: I keep forgetting that "s u s p i c i o u s" is a banned word here.
post edited by bitflipper - 2012/12/06 08:55:05