If you want simple: Pick the JPMorgan 2050 or 2055, put in 100% of your investments in there, and forget about it. If you are unfamiliar with these investments, they are like a pre-made portfolio in a single fund - they include all of the little food groups of investments you need, in the right proportions. Expense ratio is 0.75% net, which is high but not as bad as it could be.
If you want complicated: OK, I've come up with an 85/15 asset allocation portfolio that includes forget this. My portfolio only saves you about 0.11% in fees per year, mostly because your index funds actually range in costs from 0.65% to 1.2% (I looked up the expense ratios).
For the amount of money you'll be investing and the amount of headache it will create, forget it. The age-based funds are fine.