Is a roth 401k better than a regular 401k plan for a 21 year old? I dont know anything about retirement plans. But the lady giving the presentation at my work said roth 401k would be better for my age but I dont see how. Also my company will match up to 5% any tips I should consider?

I concur whole-heartedly with the responses stating that the Roth is better due to its pre-tax status.

By the way, if you take $1000 and sink it into an investment making 12% within a Roth IRA, then add $100 a month to it, it turns into $1,775,093.54 when you are 65. Not bad.