I had used Seagate drives for many years due to reviews and personal experience with them. From the amount of abuse that was heaped on products with their drives in the to little abuse always on servers. I stopped using them once I started to see ever increasing numbers of them either DoA or failing prematurely.

That having been said in response to Matthew about WD's warranty:

It depends on what "type" of drive you get from them. I have, and always will, bought server grade HDDs for everything I use. Sure they cost a bit more but instead of the normal 3-year "consumer" grade drives, I get a 5-year (with a nifty special phone number for support) "server" grade HDD. Not to mention I have had nothing but good results with their technical support and can give nothing but praises for them.

Sometimes it pays to pay more.