Battle of the affordables

 I'm not thrilled with your list, and have you had a chance to listen to any of those speakers?  The amplifier you have acts like a pure voltage source, and I think it sounds great.  I was going to suggest a list, but @freediver  beat me to it.  The only other speaker I'd add is ATC; any model that is in your price range will open up nicely with the Simaudio amp.  I am intrigued by the Bamboo cabinet speakers(Ascend Acoustics) that someone here recommended.  I never heard of them until today.  I have a different philosophy about audio than many here; I'm not interested in hunting down every possibility, combination of equipment out there.  I have little respect for 99% of reviewers out there, 100% of the YouTube influencers; a waste of time outside of entertainment value.  Most, if not all, of these players have some vested interest in pushing product, and they likely have not heard much of the competition.  If there is no local or at least not too far dealer where I can listen to a product and get help with service, advice with real product familiarity, plus support down the road, I won't bother with it.  There's always going to be something better down the road; it's inevitable, and the idea is to be happy in the now, or go nuts thinking about what you might have missed.

I went through an ordeal of ordering some well regarded speakers I hadn't heard only to send them all back and keep the ones I already had and still have. ZU Dirty Weekend, Sonist Concerto 3, Klipsch Heresy IV, Silverline Prelude (great speaker and I used them for years before the Heresy IIIs....wanted something more efficient)...all paled when compared to my "damped mids" titanium driver Heresy IIIs. Live and learn. Now I'm thinking of ordering a pair of "Pure Audio Project Duet 15 Horn 1s" that have in common with the others the fact that I have never heard them. They also have the longest name of any speaker I've owned so that has to mean SOMETHING...right? They're sent unassembled to give me something to do, and they simply would prove the point that, clearly, I never learn.

Please consider a new speaker I heard at THE Show

Evolution Acoustics Model One ... under 4k

-3 35hz to 45k

Sounds like a large speaker in any room   Sounds huge 

Best cheap speaker  ... will beat them all. ’No matter the system 

A spendor A7 tower will sound better than anything on your list and come in under the top of your range.  

Philharmonic towers are worth investigating.  

Nice Speakers listed here...I'm cheap I'll go with Polk...they aways have clearance sales...lol