Falling out of love for my Gallo Strada 2’s (long)

History: For many, many years I enjoyed Martin Logan Sequel 2’s, followed by Ascents with a Logos center. I’m talking decades. About two years ago, my SO asked me to downsize from the monstrous Ascents.  So to comply with her request, I ended up with three Anthony Gallo Strada 2’s (F C R) and a pair of their TR-3D subs.  Still using the same pair of Monitor Audio bipolar speakers for surrounds for the last 20 years.  I’ve enjoyed the Strada’s, but always felt they were very light in the low end (should be expected from a speaker that size I guess). The Gallo subs were also anemic.  I used to run a Velodyne ULD-15 with my ML’s.  I recently bought a single SVS SB 4000 to upgrade the Gallo subs, and the SVS is actually amazing, but hasn’t helped the Gallo’s lacking low midrange. I’ve used my Anthem MRX-510’s ARC (room correction) to compensate for any room deficiencies, with some, but not dramatic success. It has the Gallo’s and the sub crossed at 160hz. I’ve tried lowering the crossover to 100 per some recommendations I’ve read, which didn’t do much. Note the MRX is acting as a processor and amp for the surrounds - I also have an Acurus 200x3 driving the fronts - it’s a 5.1 system.

For home theater, which is about 70% if it’s use, the system is great, but 2 channel music is where I find it lacking.  And I’m finding that percentage is leaning more towards music these days.

I realize I’m not comparing apples to apples with m experience with excellent full range Martin Logan speakers to tiny “lifestyle speakers” like the Gallo’s, so after a discussion we’ve agreed that I can go back to somewhat larger speakers if I need to...

Naturally my first instinct is to look for some used ML’s, but i’d like to consider more reasonably sized boxes if possible. My problem is I haven’t keep up with the market so I’m kinda starting blind.

Being in the NYC suburbs, theres a good used speaker market out there, but I’m hoping to get some guidance on where to start.  

I’m also not averse to buying new, but i’d prefer the used market to get considerably more for the money.

So my question is really two part.

1) Am I going to be able to find a way to open up the Gallo’s (I’d like to keep them if possible) - perhaps some overlap on the low freq crossovers?  Bring the Gallo’s back down to ~100 and raise the SVS maybe?  Or is it a lost cause?  I’d hoped the Anthem Automatic Room Correction would have done all that’s possible with that...

Or 2) Am I going to find good full range sound from bookshelves, considering my SVS sub, or am I going to have to go back to full size full range speakers?  In either case, recommendations? (Brand, model?) considering how much I loved the Martin Logan’s, should I just bite the bullet and go back to a set?  Note I’ll end up keeping the Gallo Strada 2 center, as it just fits my environment perfectly for now.

I’m prepared to spend about $2-3000 hoping to sell The Strada’s and subs to recoup some funds.  

Any suggestions are appreciated.