X, I'd forget about the Tigre. Like a lot of Picasso material (all?) it corrodes by the speed of light

... and as for the Hunter, well, I am sure it would make a wonderful b-day present for a boyscout, however, for spearfishing it would seem ... O'mer(de)
You never mentioned (or I've overread) as to whether you want an armed-mounted knive. Assuming that: I see at lot of Italian spearos using the
Seac Samurai. Simple, practical, excellent value for money.
Cheers,
ulysses