[kspaans]

Yup, the employer-matched contributions are free money! You should absolutely take as much of those as you can. You'll always have access to the 401k account even if you leave the company. It doesn't matter a whole lot if your investments are spread across a bunch of different 401k providers/accounts.

[kasey_junk]

You should almost always roll your 401k into an ira soon after leaving your employer.

If your employer goes out of business it can be difficult (read involves the dept of labor) to get access to your money.