Agree with Brf that you're greatly limiting your choices by including only those speakers with bass controls and that employing some form of room and speaker correction would allow you to look at all speakers. Great brands like Magico, Rockport, YG, Giya, Joseph Audio, Raidho, Wilson, etc. would then be open to you as well. While I'm sure bass controls greatly help improve bass performance, I'd think especially because of your limited ability to position the speakers that room/speaker correction could help produce even better results along with greatly expanding your speaker options. If you haven't heard a good demo of the effects of room correction I strongly recommend you check it out if possible, or even better maybe you could borrow something to try in your own system and room. For most systems the difference is greater than changing components and sometimes even speakers, at least in my experience. Perhaps others who use some form of correction will chime in with their experience and maybe even some product recommendations. Also, you currently have very good speakers so it would be helpful to know more about what specifically you're looking to improve with new speakers. Anyway, just a thought and best of luck.