Here's a
link to a decent article on expense ratios. If your funds are not generally outperforming the market you would most certainly be better off with an index fund.
QUOTE
Meanwhile, in the wonderful world of index funds, the expense ratio is typically around 0.25% and gets as low as 0.18% for the king of all index funds -- the Vanguard 500 Index.
However, just because a fund labels itself an index fund does not mean that it has the extremely low expense ratio of the best index funds. Some mutual fund companies, knowing that their clients have heard about the superiority of index funds, have started index funds with expense ratios of more than 1%. Avoid these like the plague. If you've read this far, you can do better than that, Fool. In fact, where index funds are concerned, you should probably simply be getting the one with the lowest expense ratio -- probably around 0.18%.
That said, even if you are unable to get an index fund through your 401K at the moment, it still might be a good idea to get a bunch of employees to request it from your HR group as many companies do respond to these types of requests eventually when they see that there is sufficient demand from employees. I've seen it happen at a number of large corporations, so it's definitely worth it IMO as it helps maximize your return.