@mke246 Cool Loudspeaker. I assume you have them up on stands? I saw Ain't Misbehavin 3 times.
Think of it this way, you are getting two subwoofers to improve the performance of your Genelecs. Your woofers cross to the midrange at 320 hz. Middle C is 256 Hz. Your woofers are handling a very important chunk of the midrange. The Doppler effect inducing frequencies start at about 100 Hz and the effect increases as the frequency goes down, the worse being under 40 Hz. Genelec did a smart thing by rolling off the woofers at 32 Hz to save power and avoid the worst of the problem, but it is still there. Subwoofers used with a two way crossover will lower distortion in your Genelecs. I can't believe the processor that comes with them does not have digital bass management considering they also sell subwoofers. I am all in on active speakers. The excellent latency and group delay performance of your speakers is due to digital processing. The easiest way to integrate subwoofers into a system is digital bass management and you are already there. When you do play modern recordings the bass will put a big smile on your face.
I have a bunch of 78s. I can hear through to the instruments and voices and extrapolate to what the real sound must have been like, but the sound is awful. They are fun to play. Many of them have severely tortured spindle holes from changer use, talking about wow. I use an Ortofon specifically for 78's. It has a humongous stylus. I also have a collection of popular music on 10" discs, the 45's of the day.
One of the tragedies of my life was my Grandmother's ancient Victrola with the flowered horn. I thought I had dibs on it, but it got sold out from under me. I've never seen another that was in such good shape.