Best record to date price / performance

I have already the plate 4 of this variety in my PC. I am totally satisfied with each. I have no noise from the read head or what else was reported here and in operation it is also very pleasantly quiet to inaudible at idle (with the finger on the PC).
The transfer rates among them vary slightly but at the speeds is that for me perfectly fine. In formatted state I had speeds of 150 - 185MB / sec. A plate is already full, and the rate fell to the conclusion to 130MB / sec. Totally i. O. in my eyes. Whether it was the fastest of the 4 or the slowest I can not say more now.

Formatting: NTFS
2 plates were partitioned
They are cooled with a fan 240 with max 720 revolutions
Temps at full speed: about 34 degrees (room temp .: 25 degrees +, PC case internal temp: 29 degrees)
Temps at 400 revolutions: about 39 degrees (room temp .: 25 degrees +, PC case internal temp: 29 degrees)
For comparison, in the winter I was partially at 25 degrees and put the fan out already, then the temp rose to 30-33 ° C (room temperature about 20 degrees)
Temperatures measured with one sensor on each plate and with normal use (copied about 50GB and then measured).
Not by means of software.