I am a year out of college, and therefore, i don't have any real retirement/investment plans kicked off.

I was having a discussion with my boss, and he was making a few claims I would like to get some input on.

 1. There is no better investment than a 401k. The tax deferral will always come out ahead in the end.
 2. Hence, you should always put 15,000(max) into your 401k if you can.

My observations is that this seems like hardly enough to kill inflation.
Is he right? Or are there better ways to invest?

BTW, I am already maxing out a roth IRA.