PowerPoint 3-D Transitions

I'm getting ready for an interview/presentation and I was looking to add a little more spice than the standard PowerPoint transitions. I want my transitions to be a little more 3-d. So I did a little search and found some PowerPoint Plugins that have additional transitions, templates, etc. Of course I want the entire set but that's a little costly. You can purchase a set for $60. I'll wait until tomorrow to make a decision.