20 years from retirement ? I'd put most of it in an index fund, or something that closely resembles index.

At my previous job I also had Fidelity, and put everything into Contrafund. It performs pretty much like an index fund, going a little lower in recession, but a little higher in good years. Worked out well for me - as long as I was ready to dismiss it dropping down in recession.

Now that I am about 10 years away from when I'd like to sort of semi-retire, I have turned to a more conservative plan. But Contrafund made me a lot of money over the years.