Which is the fastest and best? It seems like they are more or less the same drive.
How much space do u need? Any of them is great, but I agree with Pyree,
if u get an SSD, u are getting speed, everything is faster and no stuttering and storage by choosing WD green drive or the faster WD black.
This wouls give u great upgrade. I have the Vraptor and it gets buried by my Vertex2.