Upgrade for Paradigm Prestige 75F?

I think you should consider looking at the Anthem STR Integrated Amp.  You can do a lot with the new Anthem Genesis Room Correction.  If you like all the aspects of the speaker but are having a problem in that one area, Genesis will let you tune that.  Bass also affects harmonics and you may have some things going on in your room that is accentuating that particular frequency range.  

200w x 2 into 8ohm, 400w x 2 into 4 ohm, and 550w x 2 into 2 ohm. Anthem Room Correction (can be turned on or off), Direct Analog Bypass, MM & MC Phono Stage with adjustable Rumble Filter/RIAA Curves 10Hz - 60Hz with Presets built in for Columbia, Capitol Records, and several others if you have a big pre-1975 album collection of a particular label - Can make "Virtual Inputs" and can assign the RIAA presets to an MM or MC virtual input created (up to 30 total). Do you want Room Correction engaged? Turn it on in an input. Don’t want it, turn it off in another input. Want subs to play with the system or not, assign them in the input. Tons of flexibility no other Integrated has and exceptional sound along with it. 

Built-in AKM - DAC’s with Asynchronous USB which processes 32 bit 384kHz and 32 bit 192kHz on all other digital and analog connections. 

Surround pass through and the ability to run two subs in stereo or mono where you can use Anthem Room Correction on those as well. 

People who comment on our Room Correction - MOST have not used our newest ARC Genesis that we launched in May 2019. Ton's of new options to control as well as PHASE with Subs. Please check it out at anthemav.com Our products require about 300 hours of break-in and that is per input - most people don't know or share any of this on these threads.

Thanks for your time!

Thanks Adam. I wasn’t trying to infer that anything was wrong with your Peachtree, but you pointed out that there were a lot of aspects about the speakers you liked so I was trying to point out that you haven’t maximized them to their fullest potential. Anthem and Paradigm are built off of each other and speakers are an instrument. Just like if I handed the same guitar to Jeff Beck and Eric Clapton and had them play the same tune, the guitar would sound drastically different. That is also what ARC Genesis will allow you to do. If you want your speakers to sound as if they were running on tubes, ARC will let you roll off your mids and high frequencies.
Changing the speakers means you’re looking for a different tone - like if you had a Fender and now want a Taylor. Just trying to present some options...Thanks again!

Unfortunately, there’s a huge misnomer that driver material is the Biggest problem with speakers.  While the material can interject it’s own inherent characteristics into the sound, it’s the crossover that dictates what those elements will do or don’t do and when people hear something they don’t like, the driver material is generally the easiest and first thing to get blamed.    
The cabinet/environment that those drivers are put in will affect things as well, but a lot of it circles around the crossover and just because someone uses a really expensive fantastic material for a driver when designing a speaker doesn’t always mean they knew what they were doing with it.  Best example of that is Bowers using Kevlar.  When the patent ran out, you could find Kevlar on $399 Sounbars at Walmart, but the Kevlar didn’t make those Soundbars sound like speakers worth a thousand dollars.  They used a cool material that had no bearing on that product’s performance.  Bowers had been using Kevlar for twenty years before anyone else.  Then there’s budget.  What’s the target price point for the design?  That influences a lot as well.  So, in the end, driver material doesn’t play the biggest role in the sound of a speaker and that’s what I wanted to get across here.
Thanks.