speakers with balls

I have the Proac D48R and listen to a lot of classic rock. They are outstanding......very versatile speaker.

Vintage Altec-Lansing Voice of the Theater. Big bottom cabinets, horns on top. 

Hi daveyonthecoast,
It seems that your choices are more of a lateral move rather than a move towards achieving your Balls Out goal.

Your Speakers, Zu soul have a frequency response of 45Hz-22 kHz
The Magneplanar 1.7 have a Frequency response of  40Hz-24 kHz
The Gallo 3.5 have a Frequency response of  34Hz-20 kHz

What you are looking for ideally is something that would get you in a frequency response of 25Hz-40kHz. If you can get 20Hz - 60kHz even better. But you will have to pay $$$$ for that.

You may have to do it in stages.
For instance If you like the Maggie's, then look to pair it with some REL subs. https://rel.net/speaker-pairing/1-7i/
The 3.7 REL combo will surely help you to achieve the balls out sound you are looking for. https://rel.net/speaker-pairing/3-7i/

Below are some other reputable Loudspeaker companies that you should check out. Bache should give you best bang for buck. Eagleston just merged with China, so I hope it does not affect their reputable products. Devore Fidelity is just Awesome.
 
www.devorefidelity.com
www.egglestonworks.com
www.bacheaudio.com

Have Fun,Best of Luck

Try a pair of XTZ Sound Divine Alpha's that's what I'm looking at..
The Utah audio companies RBH and Tekton.. Also add 2 small subwoofers..

Why not have both? For classic hard rock speakers try some vintage Cervin Vegas; but for a little more finesse try the a vintage C-V tower like the C-V Tr12.  And you'll still have money left over for a set of Magnepan, Gallos, or others suggested here.