Martin Logan vs. Everything

No need to compete. Two different beasts.

Getting a speaker to play well in your room is always a huge part of the equation, as are the upstream components.  It sounds like you've got yours dialed in to your liking.  Anything different probably sounds a little foreign to you, and would likely take some time to adjust to.

FWIW, I almost bought ML's based on an audition of a pair in a SOTA system/setup/room. Wow stuff!

But before buying them I listened to them again in another store (same owner) in a nearby city. Small room, less than optimum set up. Sounded lousy. Opted out as at that time I had neither the room, nor the stuff, that could make them shine. 

Most of us are attracted to a kind of sound. If you are lucky enough to have found speakers that really appeal to you, then different house sounds are not likely to sound better, only different or not as good. So, upgrading is easy, get a better Martin Logan speaker if you want to upgrade.

Sometimes our values change as a part of the learning process. For instance, I used to have a set of ribbon speakers with a bass driver. The comments were that this kind of design does not have great coherency across the audio spectrum. I couldn’t hear it. I was really happy.

Over time I attended hundreds of acoustic concerts and I started realizing the sound I liked wasn’t very real and they sounded great with only a couple genre of music. So I switched. The lack of coherence became obvious of my old speakers and other shortcomings. Now I am on my third set of this brand. If I want better speakers, I just go up a couple levels.

So, for now and maybe forever you are good.

Could it also be that those dealers sell brands other than Martin Logans??

They make some nice stuff and if you like them, then that is the most important part.