This is the 3rd fastest HDD tested by Userbenchmark and is much faster than Toshiba X300 6TB HDD which is ranked 23rd fastest.
http://hdd.userbenchmark.com/Compare/WD-Black-6TB-2016-vs-To…
In case you wonder. The fastest one tested is this HDD 1 year older model.
http://hdd.userbenchmark.com/WD-Black-6TB-2015/Rating/3519
The current price is the lowest in history as per CCC. At today's exchange rate, it is even ~AUD 2.72 lower than AUD 350 delivered deal from Computer Alliance eBay last month. That deal was sold out quickly.
https://camelcamelcamel.com/Black-Performance-Desktop-Hard-D…
Are the Blacks still noisy?? I bought a 1TB in 2010 and it was extremely loud (compared to the previous WD Caviar SE 400GB that I had). I eventually had to sell it 2 years later. Are the new models any better? Incidentally, a 1TB WD Black is the same price today as it was 7 years ago in 2010!