Best software protector: Themida or Enigma Protector?

Coders trust so much protectors that they feel secure just by enabling some/all features which the protector offers.
Most of them doesnt even care about using code markers in their source thus making unpacking very easy and cut off 50% of protector power.

All the protectors you listed are quiete good but depends on the way you implement them.

My advice: develop your own registration procedure, add some asm tricks to your app and pack it using code crypters.