I don't see anything called irrecoverable errors in the SMART data from CrystalDiskInfo or GSmartControl for my old WD 750G drive, WD7501AALS. Is it called something else? Oh and that drive has 989 power on counts and 81868 power hours. And, it says it is in good health also. GSmartControl can also run a short self-test, long self-test, and conveyance self-test. It seems to just be a front end for Smartctl. I have also read where a lot of vendors erase the SMART data from the used drives. I don't like that, but not much I can do about it.
The more I read about SMR the more I didn't like it. Even for a game drive I ran across posts where downloads would slow down to a crawl or stop using SMR drives. So, I was torn between a 3TB used or a new 1TB WD Blue as they both cost about the same. Strangely the 3TB used has a longer warranty than the WD Blue. So, I choose used. I picked the 7k4000 over the WD RE based on reliability. I trusted the WD RE and WD as a brand, look at my old WD above. But, everywhere I looked HGST was praised for reliability. So I picked it even though WD RE seemed a little faster from what I could find online. But, I didn't figure the 1-2 seconds of game load times would really matter. Why do you think the WD RE might have been better for gaming?
Hoping they are not crazy loud. Although I assume all these older enterprise 7200rpm drives are about the same loudness anyway.