All hdd manufacturers have their ups and downs. For different periods of time, different manufacturers have had bad batches of HDDs produced. Be it seagate, wd, maxtor, IBM(now defunct) etc. Generally what you would want to look out for is warranty coverage. I've had good expereience with all the brands above. I've had 1 or more of each die on me before (have been playing with computers for more than 10 years now).
I'm currently most impressed with WD's RMA method, and it's covered internationally. I can't speak for the rest currently, as i only have 2 seagates currently (one internal and one external), and they are both just dandy. The only issue with WD currently is that the Greens (internal drives) are really pretty slow. Avoid the Greens at all cost. When it comes to storage, many people would recommend you RAID. I recommend Raid 1 or Raid 01 if you need speed for the home user. Don't bother with any other Raid. Some may have you think that Raid 5 gives you more security. If you knew how long it really takes to rebuild the array after a single hdd crash, then you would have wished to never done so in the first place. Think months on a home system.
Lastly, a very useful tip. When running RAID or mirroring. Buy different brands or different batches of HDD. HDDs produced within the same batch may fail at the same time due to an inherent flaw during the manufacturing process. It has happened before. There are many more "cheem" problems when running Raid 5 and other raids during recovery.
If you're going to have 4 drives for RAID 5, might as well mirror. If 1 fail, you don't have to rebuild at all.
Just my 1 rupiah worth.