Seagate NAS hard drives have been around for a few months now and are getting generally good reviews. As you may know, consumer rated hard drives are generally not recommended for use in NAS devices for several reasons. Western Digital with their "Red" drives and now Seagate with their NAS drives have sought to provide low cost hard drives for the NAS market that fill the gap between straight desktop drives and enterprise drives that cost considerably more.
I have experience with the Western Digital Red drives but I am also sure from recent consumer reviews that the Seagate NAS drives will work well. Seagate drives go up to 4TB capacity.