I want to buy a flash for my Nikon D5100?

My choices are Nissin Di622 Mark II, Sunpak PZ42x and Nissin Di866 Mark II. I need somebody to help me choose between these three. What are the pros and cons of each flash?

None of them will work as good as the Nikon SB700. Save your pennies until you can afford one.

I have a third party flash for my Nikon D90, and it does everything I want it to do. I looked for good user reviews and the ability to swivel up/down, and left/right. I suggest you do the same.