Lowrider - do you have the Gallo CL-3 like me? I used to drive them with a 50w tube amp that was switchable to 25W triode - that was nowhere near enough to drive them properly and 50w was right on the edge. It wasn’t until I replaced the EL34 with Gold Lion KT77 that I felt like the amp was a good match, but even then I found myself wanting more headroom and bass grip so I moved on to a hybrid integrated and rolled some NOS Mullards in the preamp section. The Gallos are singing like crazy now - not even a trace of hardness, glare or harshness and the bass is absolutely ridiculously good - deep, full and tight.
Anyways, to your question, I don’t think going to Tekton will be a great move for you if you love Kef, which are pretty laid back and rolled off a little at the top end (which makes sense that you like them even with the metal tweets). I can’t speak to the Omegas as I have never heard them but they do look beautiful. Based on your sound preferences I would throw a curve ball in there and recommend one of the Goldenear speakers - perhaps the 3+ new or 2+ used. They are voiced on the warm side and don’t require current for low freq control because of the built in subs.