Both of Hitachi's 2TB lines are excellent. In my experience installing thousands of drives into RAIDs every year the HGST 5K3000 2TB has the lowest failure rate of any consumer drive (and beats a lot of enterprise drives). The 7K model is in the same boat, having failure rates lower than all of the WD lines I've dealt with (though the Reds might beat them out, but I haven't gone through enough of them to say). These also RAID exceptionally well for consumer drives.
5400 vs 7200rpm depends on the specific Touro.