Talk to a person in the IT business.
Looks like Maxtor gave the biggest profit margin that is why you find Maxtor being push by all salesman in the PC industry.

He mention for the best quality\reliability is Hitachi follow by Seagate
For best perfomance select WD but noisy and more heat and is good for gaming.

I only use Hitachi and Seagate.

In case you do not know, Hitachi bought over the IBM HDD busineess
some years ago so basically you are buying IBM HDD.

Years ago, mention IBM and you shake your head because you cannot afford anything that is IBM branded.

But now ,IBM HDD and PC is so affordable and I wonder why no one ask for them anymore.