Backblaze also uses off-the-shelf HDDs (including, when HDDs were in short supply after the flood in Thailand, buying USB drives and tearing the case off). They publish a lot of reliability numbers on drives as well (which match up quite well with my own experiences), as well as cost/GB numbers.
I remember that! I think "This Developer's Life" or a similar podcast interviewed them about trying to game the walmart hdd rationing (2 per customer) and stuff.
