The fully active speaker might be better even though the internals are or “lesser” quality. I have been impressed with most good active speakers.
the simplicity would be interesting.
I would be interested to know how the sl60 passes to KC62 sub. Does it low pass or roll off a little higher in the LS60?
I have not read the manual of the ls60 but they almost made it sound like it has a bit of EQ built in.