Just purchased 5 kef ls50 monitors for home theater
I get these on Monday and can't wait to to give them a whirl with a bluray through my Anthem D2. I think these are going to smoke the Martin Logans in a smaller listening environment and the tweeter dispersion is so wide in comparison to many other bookies. This should give a really wide even tone for every seating position.
Many people have hyped these up so I will find out for myself if they really are that great.More info on these when they get here.
regarding your Kef LS50's
I have a pair matched with Ayre K-5xeMP & Mcintosh MC452 and I have to say they sound pretty clean for a small speaker. I used to have an older Kef Reference 205s and obviously they can't compete with that in sense of depth, dynamics, and overall volume but it's not really fair to compare to a monitor bookshelf to a tower speaker. Anyways your ears and brain takes time to adjust to new sound. Your probably too used to listening to your Martin logans. Give it about a week and I'm sure you will change your mind....
I have to say though the Kef LS50 is definitely lean on the bass side but what can you expect from a small speaker. But the bass is not bad for a small speaker. The mids and highs are amazing though...so clean and neutral imo. Nice wide soundstage that makes the speakers disappear. I would recommend a sub for these speakers though to get true full range sound. JL fathom's, Velodyne DD18+, B&W DB1, RELs, or Paradigm Sub 15 are all very musical subs or SVS or HSU for home theater.