The Black as long as you don't mind the noise.
Blacks in general maybe but, not this model. Only 1TB and larger were in those benchmarks.
It was a response to Phynaz statement that WD Black's were loud. I read in some reviews that the 1, 1.5 and 2TB drives had noise issues. The 640 is not loud and is great all around. The benchmarks you posted prove that. The WD6401AALS is arguably the best Black Series drive ever made.