Depends on what your needs are. From a pure performance standpoint the Seagates are unbeatable by a platter drive. I put a 3TB Toshiba 5940rpm drive in my NAS last night and benchmarked it next to the Seagates in the server. The Toshiba did pretty well, reporting an average of of about 138MB/s. Just for fun I ran the benchmark on one of the Seagates and the graph was flat for the first 1200GB because it maxed out my SATA interface, bouncing between 160MB/s and averaged, with the flat line for the first 1GB, 148MB/s.
If I remember my benchmarks from a year ago when I stuck them on an SATA6 connector, they would give me bursts near 210MB/s and averages around 170MB/s but it may have been +/- 5 or so.
I just bought the Toshiba cuz it was $99 for a 3TB and it was right in front of me. We're it not for that, and my curiosity about how the Toshibas are working, I would have gone with the Seagates. They're quieter than the WD Greens I have and only run about 1 degree warmer. While I have had good luck with the Greens, I just can't find any reason to go with them over the Seagates.
If you want a good performance drive that has an excellent track record for reliability then the WD Blacks are just a notch lower than the Seagates but will probably be more reliable in the long run and come with a 5 year warranty.
If you can find a Hitachi for a reasonable price, storage company Backblaze says they have been the most consistent and reliable performers since 2009 and the 1.5TB Seagates are dogs.