I moved away from Martin Logan after having owned the Classic 9 and the Impression 11A. They had to stay close to the front wall, so a certain amount of absorption material precisely positioned behind them was mandatory to avoid a nasty, detail and hf extension eating comb filter. Even so, I couldn't get them to sound natural in spite of partnering them with Accuphase gear and occ copper cables. They had wonderful qualities, especially detail and a very "big" sound, but not the right timber which is very important to me as a mainly jazz and classical listener. Also I wanted a more tactile midrange and ML's midrange, while very transparent, could also be a bit distant sometimes.
The next step was meant to be an intermediate one, but I almost ended up there: the Spendor SP2/3R2 of course did not provide the "big" sound and the detail, while surprisingly good in the midrange, was not quite in the same class; however, the sound became much more natural and very musical. Harbeth M30.2, Sonus Faber Serafino and even the Spendor Classic 100 came and left, and neither Sonus Faber Amati Tradition (first version) nor the Harbeth M40.2 heard in other rooms impressed me quite enough (although I suspect both can be massaged to sound really great). And I wouldn't put the BBC type monitors on top of my list if I was listening mainly to metal, they are not aggressive enough.
About a month ago I purchased a pair of Sonus Faber Amati Futura. I posted more detailed impressions in a different thread, but I don't miss my Logans one bit anymore. They do everything great, including rock, and sound big, refined, detailed, assertive and beautiful. If you don't mind buying used, they could be an option. Alternatively, maybe the current Amati Tradition G5... As always when buying audio equipment, especially speakers, you need to have a good listen first, preferably in your room with your own partnering gear.

