Many online vendors are hiding the RPM speed.
I'm looking for possible another internal 2TB drive. It looks like WD no longer makes a Blue in that size and 7200 RPM. Blacks are pricier and I prefer WB Blue because the only drives I ever RMA'd were WD Black. One of the other differences in Blacks is they offer a larger cache.
Seagate offers 2TBs at 7200 RPM. I haven't bought a Seagate in a while so I don't know what their quality is like anymore. With WD they do have the best RMA policy out there. They send you a drive and you send the other one back.
I hate shopping for drives since they are now hiding RPM specs. That rant is often seen on a site's Q&A.