Thank you all for your input. I learned some things from all you guys. For example, I had no idea that speaker impedance fluctuates, sometime drastically. I may give Fritz Heiler a call. His claim to fame is producing Tube-amp (SET amp) loving speakers with stable impedance. His speakers, however, are not the most sensitive. It will be one of the things I will ask him about once talk to him.

I will hold off on speaker cables for now and put the money towards better speakers. After careful consideration that seems like to most sensible course of action to take. If it wasn't for all of your contribution to my plight, I would have continued to chase my tail in my quest for better sound without even being aware of it. Again, Thank you all.

I agree with those advising a focus on impedance over sensitivity. Much more important, especially considering a tube amplifier. Sensitivity becomes most  important in large rooms. Always important to match impedance to amplifier regardless of room size.

I own Fritz Carbon 7s with a PP tube amplifier using EL34 output tubes in triode mode to drive them in a 12 x 15 room having 8.5' ceilings.

These, Marrow Audio, will not break the bank. Have on two systems. Cardas Iridium line very good/affordable.

@diminishedchord hook up VSi75 with your speakers. It should have no issues driving the Arias. You can experiment with 8 or 4 ohm taps and land on whatever sounds best. Get a baseline for the sound you’re getting. The Aria 926 are pretty competitive and with the right amp will sound very good. You can then either upgrade the cables or research what speakers to get next but keep in mind, again, the 926 are not garbage.