10GB RAM: RAM is cheap, came with the refurb, no regrets.
HD failure: has nothing to do with a refurb, perhaps it was a mfr lemon, only the 2nd HD that has failed in about 30 years of using PC's. Why do you endorse use of imaging software unless you foresee a HD failure? If a HD never fails, no need for imaging software.
HD replacement: 90 day warranty on the refurb, expired. That's the breaks. Had the computer fully restored within a day with the new HD I bought. No regrets on that either.
Recovery disks: agree not a good way to restore, but without an image backup with bootable media, that's the only option. My oversight in not creating a bootable image backup.
Quicker to wipe, clean install, and reload apps: no way. A clean install, followed by the long set of Win updates, and then reinstall many program, followed by updates, takes forever. We both agree that image backup/restore is the best way. I'm just very happy that I had the recovery discs, that I could reload Acronis, and then restore my image backup to the new HD.
No regrets on my refurb. A HD can fail at anytime, but rarely does in my experience.