I use several stands when I am building a player specific display. The stand in your link above will not work for graded cards, they will "tip over". They make a 2 piece stand that is best for graded examples. I buy all my supplies from mattsbaseball.com [800-675-1898], Just ask Matt for the 2 piece acrylic stands.
I have both 1 piece and the 2 piece stands pictured here. I will only use the 2 piece stands for graded going foward.