Best active speaker

Wow thanks for the great find! Jtgofish. I never heard of S.G.R before. It seems like the land from down under is particularly fond of the active approach.

Salagar uses Icepower amps for their active line of speakers.
ATC is very good but I must say very energy wasteful. The heatsinks are hot to touch even when not in use. I read in HDD forum according to AVIhifi founder which is an ex ATC engineer that he finds ATC outdated being that they are spending way too much money on old technology that can't compete with the current ones.
Goldmund has great active speakers as well except they are insanely expensive.
Linn and Naim are great proponents of active loudspeakers.
Dynaudio has some great models as well.
Of course there's B&O that owns the Icepower technology.
If I don't mind the hassle and risk. I will get a deqx crossover with digital outputs connected with Nad M2 pure digital amplifiers with some state of the art loudspeakers.
The so called Class D is going to be outdated soon.

ATC speakers starts rolling off in the bass early and more gently than a lot of speakers out there. This will help with room integration as the room will definitely boost the lowest bass by quite a measure thus achieving flatter response in room. ATC speakers also put more emphasis on sound pressure and distortion levels, so as the result they would compromise in terms of bass extension. But really, who nowadays have a 1000 sqft listening room anyway?
What really bothers me is ATC's treble extension. The seas unit they have been using just doesn't go high enough. Sounds more forced than effortless.

Another factor you should look into is that ATC don't put a lot of emphasis on cabinet resonance control. Perhaps aside from the Anniversary 150s, all of their speaker cabinet sings to the drivers quite a bit which is quite baffling since they are so heavily constructed. ATC is definitely not one of those speakers that uses the latest computer modeled cabinet design topology.