You don't lack bass, you have too much treble

Better components ad infinitum will not beat a dedicated once for all acoustic room...

No speakers beat their room said some anonymus acoustician i forgot the name ...

It is incredible that so many people vouch for better gear design always, costlier upgrade, never for acoustics understanding and improvement perceived at most as secondary ...

Even miraculous Dr Choueiri filters can correct all stereo system which are all of them defective because of crosstalk, unbeknownst to most audiophiles,  but even dr. Choueiri need for the best optimized results a dedicated acoustic room and inner ears measures and HRTF tracking ... Psychoacoustics rule audio not mere gear design price...

Then asking for changing good speakers for costlier one is preposterous more than half the time and absolutely not comparable to acoustics improvement which can be and must be made ideally for the chosen speakers properties and type ...

I am not so sure I agree with the premise of the OP. entirely. No doubt the room is hugely important and intelligent use of treatments is paramount, but I dont hear room problems in terms of balance. Mids and highs do nothing to add to or detract from bass. 

You can modify the balance between frequencies by room modification easily ... I did it with a grid of tuned resonators...

And room acoustic is way more complex than buying a few panels ...

@audition__audio  Do you believe you can have too much or too little bass, midrange or treble?

I usually ’go flat’ to start, then tweak above 6Khz to compensate for ears with aids.

Spouses’ ears are OK, so she informs when high hi’s are ’nuff. *G*

Bass is fine: 2 - 10" in 3way driver cabs, mids & tweets disconnected.
A single self-powered 8" in it’s own original cab.
When the Walsh get to harmonize, the upper bass/mid cones are equivalent to a 7" in surface area and make for a nice ’fill’ in the near ’back’ (Just don’t have the floor space for Everything front stage....).

If that ever becomes boring or seeming to be weak....which I can overdrive the space now....

2- 18"s. 1 - 12", and a 10" that has a mag structure as big as a 100’ spool of #12 speaker cable and weighs ’bout 30ish lbs. by itself....all of these desire a cab that I don’t have the room or the amps to do it all some form of injustice....

Oh, and there’s the 2 - 12" Utah’s with their matching expo horns that could punch through all that, even set up like a NY Ohm as they is...done for grins and a way to store them....

If the treble needs more than the pair of large Heil amts’....got another pair. ;)

Yes, Erik....absolutely crazed. *L*

But....Not Insane.👍😎