As far as hard drives are concerned Seagate seems to be the best option for me and if you already have not made up your mind then it is better if you check out some of their products before going for any other option.
You might have got a Samsung drive that never failed so that's why you think it is the best and it is same about the Seagate as well.
I own a small computer shop, and i sold hundreds only this year. I don't have one myself, i have a laptop now. I did had one on my old system, a 500GB one, it ran like the wind... And very quiet, not like the WD's. I never sent a Samsung back with a warranty issue, but Wd's , especially the 160GB model, the black one, about 20 last year. So i don't sell WD anymore, i hate when customers come back with damaged stuff.
So if I had to choose for myself, i would get a Samsung. But if I were to read what was written on this thread here, i would go for the Seagate. You know, the years they have behind...
Oh, and if you see anything about green on the specs, run. That means slow.