Yes and no. I will always use percentile dice over an actual d100. Two reasons: they take forever to stop, and even when they do, it's hard to tell what number is actually on top.
I order mine online from the Dice Shop, although I usually wait until there are a few I want. I've picked up a d14, d16, d18, d22 and d24 which I've considered using for high-powered Savage Worlds characters, and some nice fudge dice which I also use for Savage Worlds. I also bought a d3, d5 and d7, which I've found absolutely no use for, a weather die which I've used once, a virtues and sins die which I use for NPC motivations, and a hit location die which I use for exceptional attacks (2+ raises) and killing blows.