Can't really vote in this, since the option I would choose isn't there.
I would never modify my body in order to "beautify" it's appearance (like face-lift, penis enlargement, face scupting etc.). Also I don't see the point with pushing metal objects through my skin and leaving them there (piercing). I don't see any reason for sliting my own tounge in half.
But if the technology would be available, I would, without hesitation have my own arm chopped off if it could be replaced with a cybernetic arm superior in strength and dexterity to my own arm. That sort of body modification isn't available yet, but when the day comes, I will gladly begin my transhumanistic voyage.
My body is just a vessel after all. If it can be changed in favor of an improved mechanical vessel, then why not?