Exo-Tec Zip Binder from Vault X in black, for 160 cards: 20 double-sided pages with 4 pockets per page. The pockets load from the side, so cards don't slide out — even when double-sleeved.
The Exo-Tec cover is padded, sturdy and water-resistant, and the pages are acid-free and PVC-free, so they are safe for your cards in the long run.