Should I use RAID on my PC?

I'm thinking about buying another HD for my PC that i built (3.33GHz Celeron D, 533MHz FSB - 4GB RAM) it has a 130GB internal, but i'm running out of room. I've been toying with the idea of putting in another 250GB + RAID controller then setting up RAID-0 with data striping- heard that it's efficient. any one have any suggestions or experiences.