Is there a chance they will produce top-loading versions again? In my experience side-loading pages cause the cards to slip out while turning pages, and eventually you'll end up with bent cards from someone carelessly turning the pages too quickly.
CunsoIve never had that problem with side loading pages personally, but anyway, if the v2 side loading FOUR is anywhere near as snug as the v1, then I wouldnt worry about cards slipping out on their own.