Should I get a Motherboard with 2 or 3 PCI-E Slots?

I plan to use a Sound Card and Video Card. What else is there to use a PCI-E Slot for? I’m unsure if I plan to use SLI in the future and would like the option to, but I’d also like to know what else I could use the slot for in the meantime. If [...] http://bit.ly/psSDbE