I've been using the Staples pages mostly with pretty good success. I have seen an occasional page where one of the rows was overly tight but in most cases I was still able to use them as they seemed to loosen up once a card was inserted. I have had two packages of pages where the ultrasonic welds between rows were separated when I opened the pack and the pages were unuseable. However, Staples quickly replaced both packages when I showed them what happened. Overall I've been pretty happy with their's but unfortunately there's no price breaks for larger quantities.

Some collectors use the baseball trading card pages since they have more room and you can even put several cards in one pouch but there are only 9 pouches per page. I prefer the business card pages myself with 10 cards per page.

Whatever brand you try just make sure they're archival quality so they don't damage the cards over time.

For more common cards I've been using business card storage boxes from U-line that work out pretty well also and they hold about 200+ cards.