Let me just say this:
You are putting all of your eggs into one basket. You are assuming there is one brand, one manufacturer, that will produce flawless discs that will work 100% of the time and last indefinitely (or, at least, longer than a couple of years).
Let me also say this:
A more productive use of your time might be to get multiple brands across the spectrum, so that if one batch of backups goes bad for one reason, it might be localized to that batch. I mean, look at RITEKG05. You could use a TYG02 strategy and get some seriously attractive burns. Then they deteriorated like no other disc models that we know.
Now, you have other people telling you that these TDK-based discs are likely going to remain a viable source of backup for a while, yet you have concerns that because a disc doesn’t score a perfect 100%, it will fail early. Well, if that is your concern, branch out into other brands. TY still makes discs, and as far as I know, their DVDs have not been a cause for concern. MKM DVD media is still the same; it may not scan so very pretty, but if you spread your backups out, you shouldn’t have much of a worry. [Also, commercial DVDs don’t scan anywhere as nicely, and some of them are good…some are bad. It’s hard to predict].
And consider getting another medium. There are actually some really insightful discussions here about using hard drives as backup media. Or a solid-state drive, since flash memory is meant to be quite stable. These are just a few of your options to hedge off any concern you should have about preserving your memories. You just have to find the right way to do this so you can safely not be paranoid. Isn’t that part of the fun of this all? You back it up, and you forget about it…maybe checking up on your backups every once in a while. Between checkups? Forget about it.