How many speakers do you have on display for people to audition?
Great EQs are both very expensive and difficult to use effectively. There is no guarantee that the person will make the sound better than a great pair of speakers that don't require the EQ.
Would you guarantee that someone will like the sound of a speaker without knowing how well they can hear the sound it produces?
I don't have a store but the B&M stores all have many brands and models but I do mostly custom installs and often, that involves using equipment that's already there. Above the line with your equipment, it shows "Authorized RBH dealer"- I might ask the same question.
Your comments about equalizers is very appropriate for this discussion. Too many people buy them to "fix" problems that can't be fixed by using an equalizer and most have no clue about how to use one correctly. This leads them on a never-ending quest for better sound and at some point, they might come to a forum like this for answers. I think more discussion about how they should be used might clear up a lot of confusion, but when people disagree about something, it would be an uphill climb. It's the same reason there's no universal agreement about speakers, or any other piece of equipment.
If they're so difficult to use, why have s many people bought them? Partly, because they have been mis-informed, IMO. Some buy them because they have heard a system with one, some because they came to the conclusion over time and in some cases, because the system was properly designed by someone who actually knows how they should be used. Without knowing how an equalizer should be adjusted, people would be far better off leaving them alone. There is no guarantee that they'll get what they need but it's a lot less expensive than a great speaker. However, it's not always the speaker that needs the equalizer and that's where I have a problem with the way these are sold/bought. People think it will cure all of the sonic problems with their system, when they're really made to address
specific problems, not general issues. Used correctly, they can help with problems that would cost far too much to correct through other means. A speaker crossover is an equalizer just as much as one that's in an equipment rack. Whether it's adjustable depends on how willing the manufacturer is to letting people screw up the sound of what they designed.
In order to solve a problem, it must be identified and, while we know that the OP has hearing damage, it's impossible to offer an accurate solution because we don't know the extent of the damage or what frequencies are affected. If he finds speakers or an EQ setting that happens to match his needs, it may turn out that nobody else will want to be there when he used them because they can't stand the sound.