Well, the Blues are mostly 5400 RPM. Of the 10 models, 3 are 7200 RPM. And of the two 1 TB models, one is available as 7200 RPM.
WD60EZRZ 6 TB 5400 RPM
WD50EZRZ 5 TB 5400 RPM
WD40EZRZ 4 TB 5400 RPM
WD30EZRZ 3 TB 5400 RPM
WD20EZRZ 2 TB 5400 RPM
WD10EZRZ 1 TB...