Nice! I currently run kessil, AI, and T5 fixtures on various tanks. I initially started with kessil and switched to AI for controllability etc but honestly I've been pretty underwhelmed with the lenses constantly melting, mediocre coral growth etc.. I can't speak to the growth of SPS with kessil because I only run it over LPS and Zoas however the shimmer like you mentioned is gorgeous. I recently switched my SPS tanks to T5 and could not be more pleased, the coloration, growth, overall appearance is wild. I'm debating rigging up an A 80 I have in this build with the T5 just for the shimmer, however everything I do from now on is going to be T5 or Metal Halide I think. I am however, curious about the Quanta Atlas light so I may check one of those out. All that to say, my two cents (For what it's worth), I would rank T5/MH, then Kessil then AI.
WIth as much as I'm gone I rely heavily on my ATO, Inkbird, and autofeeder. The biggest issue I've had is the ATO. I've had Tunze and Duetto and both have failed me and caused issues despite consistent maintenance. My cheap amazon ATO's I run on my other systems have never even hiccuped though. Just food for thought there. It's all definitely doable without the hydros/apex though, especially with webcams.