Arachne and kg_evilboy were faster
In these days the easiest to find are 16x certified media. I suggest to stay away from the "Pearl White" series, because these are not genuine verbatim but rebranded Ritek media.
Life duration of a media is related on many factors, like the batch of discs, the amount of errors after the burn, and the way you store them. If you get a bad batch with some production defects, these will have a shorter life.
Moreover, it's better to avoid sticky labels on the disc, to avoid warping. Store your media away from sunlight and preferably on single jewel cases, again to avoid scratches and warping.