I'd say anything you can find, you begin protecting your money from the instant you convert it. You'll get the most bang for your buck with bars and the price gets better depending on size. I like both rounds and bars personally and I look for "secondary market, varied condition, any mint", you find those to be a little less expensive compared to new uncirculated bars and rounds. I'd definitely suggest nothing fancy or name brand unless you're looking for a novelty or something. My two personal choices are below. Just FYI, I'll happily share what I know from my own experience with you, but I'm no authority on the subject. https://www.jmbullion.com/1-oz-silver-round/ https://www.jmbullion.com/10-oz-silver-bar/