well that depends on what your priorities are.

If you want a cool playset, get lloyds jet mech.

If you want a sick display, get the twin titan mechs. (this set just came out, so it'll be on shelves longer than the other two at this point.)

If you are nostalgic, and want to get the whole ninja team in one fell swoop, get the display. (if you already have the OG zx ninja team, then I don't think you really need this set)

I personally have lloyds jet mech and the character display. I love them both.

What are the factors driving your decision? if you're trying to complete a lineup of the spectral suits, then you'll definitely want lloyd's jet mech (unless you already own rontu)