IMHO:
Best split fin, Apollo bio-fins.
Best paddle fin, Dive Rite XT.
Just a biased personal opinion.
I still have my original pair of Jet fins, Mares Power Plana, Mares Quattro, Original Force Fins and
others.
Choose the fin for the dive at hand.
It is good to see new fins being introduced.
For me, my current fav is the Apollo XT with spring strap, allows for a wide kick, a back kick and
lots of power and propulsion.
Just personal, of course, everyone has their own favorite and opinions are always interesting.