I've never been a fan of Tecton. I find their business practices and engineering both lacking. KEF, on the other hand is pretty unimpeachable. Unfortunately. They typically don't work well in larger rooms, for all kinds of good acoustical engineering reasons. You have space for horns. But good ones suitable for large rooms i.e. JBL 4367 are expensive. So are Klipsch Cornwalls for that matter. What you may want to consider are the Monitor Audio S300 7G. Stereophile Class A rated, theybare efficient enough to work well with your existing amp, sonically, they have the dynamics of a horn speaker, and the smoothness of a KEF.
I've had their little brothers, the S300 7G, (same mid and tweet. 2X6" woofers instead of 2X8") in a smaller room since 2022, and have found no reason to.change them out. I also have KEF LS-50s in my office, JBLs in my theater and a pair of Magnepans in storage ( I just dont have a Maggie-friendly room).
They are worth the effort to find and listen to. Promise. At least Google "Stereophile S300 7G" and read the review. Or go to.the.Monitor Audio website and check the numerous reviews and international awards the S300 has received.