As others have alluded to above, you listened to the Martens on their home turf hooked up to a system designed specifically for them. That said, it does seem that the system may have uncovered that you may desire a little more detail than you're currently getting from your system. You have great speakers and you obviously chose them for a reason, and I agree with others that it's well worth experimenting with cables and upstream gear to see if you can coax some more detail out of your SFs. Heightened detail can often sound attractive on first listen in a strange environment, but over the longer term it can often become fatiguing. My guess is part of the reason you chose the SFs in the first place was that they avoided this, and it is quite possible that if you plugged the Martens into your system you may quickly tire of them. Perhaps a good idea would be for you to share what electronics, cables, etc. you're currently using and that might elicit some good suggestions here for some things you could try. My guess is you'll be able to capture most if not all you feel you might be missing now, so chin up and have fun experimenting. The good news is you know what you're looking for and may be very close to achieving it, which is more than many audiophiles can say.
I hate when this happens ......
I was on business last week and I stopped in to visit a very nice high end shop where the people were actually very nice and cordial. I listened to a pair of Marten Django L speakers. ( these were are the XL 's ) and was very impressed at the sound. Musical and dynamic and yet not clinical or sterile. A very well built speaker for about $10,000. I just paid off my Sonus Faber Olympica III's which are not inexpensive.....and did that ; hmmm for a moment. What impressed my was the musicality and no surprise that Sonus Faber does have house sound as all speakers do, but the Marten's just seemed to allow the listener, me, to see deeper in the music. So if any owners of the Sonus Faber's and Marten Django L's care to shed some light I would like to hear from you. I hate when this happens......