So, its not necessarily a "which one should I
support". One of cephs great features is you can support all 3 with the same storage
and use them all as needed.
..with the caveat that you can't serve the same files over them, but
it is quite true that you can have all three served from the same
cluster, stored on the same drives and so on.
--
May the most significant bit of your life be positive.