Having been an owner of Merlins and Omega's, I think I understand the sound you enjoy and perhaps can offer a some further suggestions that might help you tweak things a bit. Really though, they are just rehashings of what other posters here have already said.
I have had my Superhemps in a variety of configurations from short wall and long wall in a long narrow room, extreme near-field in a small room, to near perfect conditions in yet another. Concerning the speakers only (of course stands, room treatments, amps and everything else contribute to the problems and wonderous solutions), there are some general areas that I always fool with to get them sounding sweet. First is the port and whether it is open or closed. Until I upgraded to Alnico's, I always prefered it open. That of course means you must play with how far the speakers are from the back wall. The balance of bass to treble is highly affected, so don't forget to play with sidewall, backwall placement. Also, I have found I always enjoy my Supers more when they are either toed slightly outward (Terrific wide soundstage!) or toed in with the drivers crossing just in front of me. This may be a good solution for you. Also, believe it or not, I have had incredibly good luck with mine set up on the long wall. The stage is huge and imaging is extremely good.
Okay, so nothing here is new or rocket science, but sometimes just going back to basics can make a huge difference. And don't forget, even though you are the second owner they may not be fully broken in. Especially the ferrite hemps, as they take a VERY (hundreds of hours) long time to completely smooth out, but once they do....
Good luck!
gb