Personally, and this is only my opinion... I rank them about 3rd or 4th...
The Hitachi's and Samsung's I think rank about 1 and 2 (I have the Hitachi 1TB), and then I think the Seagate's rank right behind them.
I think your opinion is wrong, and the FACT is the seagate barracuda 1tb beats the hitachi 1tb drives anyday, this is why I went with the seagates and never looked back. I've been a hitachi lover for a quite long while and hated seagate hdd's, but these days its been the other way around.
http://www.barefeats.com/hard94.html Notice the seagate beats the Hitachi in 8 out of 9 tests.
http://www.barefeats.com/harper14.html Notice barefeats dont bother to add the Hitachi Deskstar 1TB drive.
Pretty much though the order of things in speed are:
1)Western Digital WD6400AAKS 7K 640GB
2)Samsung Spinpoint F1 7K 1000GB
3)Seagate Barracuda 7200.11 7K 1000GB
4)Samsung Spinpoint F1 7K 750GB
5)
Hitachi Deskstar 7K1000 1TB 7200rpm
But for me since the Western Digital WD6400AAKS is only 640gb as to 1tb I find the seagate barracuda as the #1 or #2 ranking spot + reliability is better than the samsung spinpoints which I hear has a much much higher % of hdd failures.
As for #1 bootdrive I'd go with the WD6400AAKS (I currently have the raptor 150gb but I hear that the WD6400AAKS is very fast and bests even my raptor with 10k except the seek time of course but for more space I might sell the raptor and get the WD soon), but for 2nd,3rd or 4th storage, I'd go with the seagate barracuda 1TB drives for speed/reliability.
Man for $189 or $199 this is an awesome deal, I might have to take the plunge. I just bought my seagate barracuda 1TB just a month ago for $269 for the NS model ending with the higher mtbf of 1.2million instead of these seagate barracudas 1TB with the half the mtbf (750000) ending in the AS model numbers.