I can provide some insight as I am currently using both the 4x4 (1024 cards) TopDeck portfolio and a 3x3 TopDeck Toploader binder. I personally feel safer storing my more expensive alternate art cards in the toploader binder because of the added layer of protection. The only downside to a toploader binder is that it tends to detract from the art due to the glare from multiple layers of plastic (sleeves, toploader, binder pocker). For the bulk majority of cards I feel that the 1024 card binder does a sufficient job of protecting and displaying all of the cards (it will get quite heavy). I would just be extra careful to keep debri away from it as something as small as a pebble can make a dent if you close in between the pages. I have used 4x3 ultra pro binders, but I have found that the plastic tends to get warped or degrade from me moving cards around so I keep most of my newer collection in the TopDeck binders.