The Verbatims at Sam's Club are your typical CMC Magnetics spindle...the same kind you'd get if you bought Imation or TDK (the Made in Taiwan version). They're not bad. CD-R technology has certainly advanced from 4 years back, when it mattered more what kind of disc/dye you got. Yet, people still repeat what they hear from 4 years ago. I haven't ever seen anyone say an Imation or TDK CMC Magnetics disc has failed on them. It's mostly the generic ones with no topcoat that gave most Taiwanese manufacturers a bad rap. You won't see cheapo, generic "Made in Japan" discs often because prices are higher in Japan. So if you're trying to keep costs as low as possible, you wouldn't go to Japan for the source of discs. End result is that the lowest-end discs give all discs from Taiwan a bad name.
You can't go wrong with "Made in Japan" discs. It doesn't matter to me though, whether they're Made in Japan or Made in Taiwan. As long as they have a good topcoat on them (i.e. as long as you get it from a big name such as Imation, TDK, Verbatim, etc.). None of the taiwanese discs have ever given me trouble, even back in the days when quality variances between cd-r discs were much greater.
Of course, if the choice were available and price didn't matter, I'd always choose Made in Japan. It goes for any product, not just CD-Rs.