I wouldn't hesistate buying either a Seagate or a Western Digital hard drive. I think both companies make decent quality drives. I wouldn't buy an 11th generation Seagate drive though. I've heard that a higher quantity of the hard drives of the 11th generation produced by Seagate are defective.
Seconded, Barracuda 11 series drives with SD15 firmware can randomly lock up on bootup, so bad Seagate released a firmware update which bricked 500GB drives and then a second update after that, they even offered free data recovery for effected drives if I recall
Post firmware update my Barracuda 11 drives are both going strong though
Personally I think WD's the best followed by Samsung then Seagate then the rest