3 Pin with Cable or NNN BC for Karhu Pinnacle

I recently bought a used pair of Karhu Pinnacle skis (160:70/60/65)with
nnn bc bindings. I also have a pair of Karhu Sirius 75 mm boots. My
question is whether to buy a pair of NNN BC boots or mount 3 Pin
bindings on the skis. I was thinking of Voile 3 Pin with cable. Would
the 3 Pin with cable and Karhu Sirius be overkill for this ski?

I'm about 150 lbs so the ski may be a bit short. I want to use these
skis on hiking trails that turn and are sometimes steep as well as
occasional forays into the trees on moderate ground. Several miles of
flat terrain separate me from the hiking trails but I regard this as a
commute rather than an end unto itself. Of course, it's nice not to
struggle too much on the flats. I have heavier AT set ups for more
more downhill oriented skiing but no lighter rigs. Any thoughts on
this dilemma?