I put off trying Martin Logans for most of my life thinking they were not a real speaker, or a gimmick, I could not have been more wrong. Now I have a pair of Theos in my main HT and they sound amazing. I have not noticed the negatives many have mentioned. They simply sound different from other speakers and I like that. Just utterly clear vocals, huge sound stage, details I have never heard before, and they make my HT come alive . I am pairing these with a Stage center, Dual SVS SB3000's and some Def Tec surrounds. I thought I would like the Montis more but I was wrong, I guess they were too big for my room or something but I like the way the Theos integrate in my system much more. I am powering these with a Bryston 4B3, so there are no power issues. But you have to remember how highly subjective this is to one's own tastes.
I thought there could not be a box speaker that could do what the ML does at a price I could afford and I was wrong about that also. Luckily there was a hi fi shop that would let you take stuff home near me and try stuff out in your own home for 15 days. I went through 6 pairs and eventually got some used Audio Physic Avanti III. To me they are in a league of their own and simply disappear while throwing up a huge immersive sound stage with every nuance and detail coming through. FWIW, these are not new but were 11k 20 years ago. These were Michael Fremer's reference speakers for a while and he did a glowing review of them for Sterophile.
If you have the right space and proper set up, Martin Logan's are hard to beat, IMO.
Note to self : never type anything like this first thing in the morning again.