Not all cards are suitable for grading, although we advise all collectors to have PSA grade their most valuable cards. I card holder to send them to PSA or one of their dealers. We sell Card Savers to PSA and most PSA authorized dealers. We also make clear plastic bags that prevent scratching and custom pouches for graded cards. You have a number of choices based on personal preference and your card's value.
Personal choice is hard to gauge.
Card Savers are easier to insert and remove your cards but aren't as rigid as top-loaders. If you want to change holders, you might not want to use a screw down holder. Try our cardboard shoebox or big shoebox. If your cards are valuable you should be using Lucite holders. Lucite is an extremely strong and optically clear brand of acrylic made by Dupont.