Should I get the Art Audio Jota

Depends on what your musical tastes, sonic priorities, room size, and average listening volume is.

There is a BIG difference between a 70wpc PP 6550 amp and a ~24 wpc SET amp. Not trying to imply that one is better than the other, just that there is a big difference in how music is presented - especially in the midrange and bass.

I really suggest that you audition the AA Jota or any other high-powered SET amp in your system before buying. It will take a week or so of serious listening to really appreciate most of the benefits (and drawbacks) of PP vs. SET.

BTW, I own an Art Audio PX-25 and love it.

Thank you. I've been told that my speakers are more demanding of an amplifiers current than it's wattage and that the Jota BX would actually sound more powerful. Since I acquired the Modwright, there seems to be just a little too much of a fuzzy warm aura that I'm attributing to the Premier 11a. I'm seeking something a little more truthful.

I also recommend try to listen with your preamp. ( I own hi-current Jota monos )

I never cared for the CJ pre/AA pairing, but that's me.
A preamp influences the sound of the amp a lot.

You'll be definitely breaking the same make synergy of of the CJ kit in that you might have to look for a preamp that will work optimally with the Jota.

From what I know from some reviewers about SETs and I have read a lot the Mini Utopias will be successfully driven by the 24 watt Jota (high current version).
Some SETs have even been reviewed driving the Mezzo Utopia which is a heavier load.
24 watts of SET power is not the same as any other 24watts.
In the SET category a difference of 5 watts is a lot.
Some reviewers have driven the Wilson Watt/Puppy 7 (nonimal impedance 4 ohms) with a 23 watt SET to a satisfying results.
It is true that the Watt/Puppy is more sensitive than the Mini Utopia but still they are a heavier load having in mind their impedance variations.
The Mini Utopias are relatively small speakers having a nominal impedance at 8 ohms (Correct?) and I think that the Jota will drive them to satisfying levels.
At least for me ...
Your pre-amp should do in my view.