Full range tower speakers with bass under $10k

Aerial 7T

For my far less than $10K... I purchased some Sonus Faber Olymica ll"s here on AG and added an ancient M&K 125 powered sub crossed over at 35hz driven by speaker level inputs off my ARC power amp. This gives an extremely coherent sound stage and deep controlled bass when its actually on the source recording... Not added as a by product or an overly emphasized thickening agent.  Most people who have a new subwoofer want to "hear it working" at least at first, and then over a period of time, dial it in to be as transparent and coherent with their room and overall system as possible so as avoid listening fatigue.

Pay detailed attention to placement of speakers and subs too.. Acoustics play a huge role in your listening experience and fantastic speakers/subs can be awesome or terrible by way of room placement.

When I was in the high end audio business years ago I often had to make some home visits to assist in clients getting the best out of their gear. Many of the better dealers want you to be 100% satisfied with your system, they love it when you love it!  They want you to be an enthusiastic hobbyist, maybe even drag your friend in! So be sure to ask for on-site help from a pro for trouble shooting if your are not happy with your sound.  AG can, of course, be a great information source however... Your room, gear and ears are uniquely YOURS!

It appears from my understanding of this discussion that you are not driving your subs with the proper outputs... This makes a HUGE difference and you are correct in that an electronic crossover in the signal path can have substantial negative sonic artifacts and for that reason many subs are driven by speaker outputs off the power amp at the end of the output chain rather than earlier.  

Some pre amps are not designed to drive lower impedance loads... ARC pre amps need to have a 20K ohm load or more to work properly and I am sure others have their own design limits.  Driving a sub with the speaker output method also tends to reduce cable sonic artifacts although not entirely.  Good quality speaker cables can still play a role... 

As the resolving powers of many high end audio systems can be revealing of every component, interconnect, AC power, fuses etc... It  gets to be a matter of can you hear music the way you want to hear it? Does the equipment fit well into your space? Thats why auditioning equipment is so educational in this hobby... To many, the cosmetic appearance of gear, especially speakers can also play a big role in choices.  

I love the sound of many B&W speakers, way ahead in sound for their day and even visited their main factory in Brighton England with John Bowers himself... I loved his wit and I quote... "We do our best to make our speakers idiot proof, the problem we find is that idiots are so F---ing ingenious!!!" 

From my memory, the REL subs mentioned above in this discussion are designed to only be driven by the speaker outputs of an amp and they are some of the best subs I've heard, great looking too and come in a variety of price ranges and sizes.  I think REL also provides a wiring harness to hook up to your amp outputs but its been a while since I auditioned them so things may have changed a bit.  I will probably get one in the future.

 If I were redoing my system speakers at the $10k price point I would consider the Sonus Faber Olymica lll's used here on AG, which are 90db efficient compared to my Oly ll's at 89db, go deeper in the bass down to approx 35hz and sell here on AG for well under $10k leaving some $$ for the REL Sub of your choice.  Of course your ears, your room, your taste in sound is unique to what gives you the pleasure when your listening.  Enjoy the music!

Wilson Sophia’s.  $5000 - $7000 range for a decent pair.  You won’t need a sub since you’ll get detailed resolution down into the low 30hz range and you’ll get better soundstage, dynamics and resolution than most speakers mentioned.  Don’t take my word, do yourself a favor and listen to a pair before purchasing.  

Tekton Ulfberhts for $9K. That is the deal of the century. The $3K Tekton DIs displaced my B&W 804s I loved for years. Wasn’t even close. I then upgraded to the Ulfs. It was an amazing transition. They are large but if you’re looking for a truly full-range in a speaker, this will handle anything you throw at it. https://www.tektondesign.com/specials.html

I may be biased, but I'm upgrading from B&W 805S to new B&W 804 D3s.  I invested a couple of hours at my dealer listening to these with some of my favorite test tracks, most of which need speakers that can move air. IMO, the B&W's delivered all the low end I was looking for and in a way that didn't overpower me or seem artificial.  Articulate, smooth and very engaging is how I'd describe them.  I think the 804's are the hidden gem in the B&W 800 series.