I will also second the recommendation for Vanguard, which have a slight edge over Fidelity in keeping their customers needs first, and keeping overall fees low — in fact, it was largely Vanguard’s competition that forced Fidelity to lower many of their fees over the last few years.

As a mutual fund shop, you wouldn’t go wrong with either Vanguard or Fidelity, and I might also add T. Rowe Price in there as a close third. Note that I am not recommending each and every one of their long list of funds — if you have as many as Fidelity does, there will be a few turkeys in the flock. But overall as a fund company they are recommended.