I agree you should check out Vanguard, and the only fees should be the small percent from the index fund you put it in.
I just read your reply about the "non-penalty option" which is great, so congratulations on that. However, I read that right after I typed the following which I'll leave up in case anyone who just turned 54 is considering the same thing:
I think you should look into every other possibility before paying a 10% penalty for withdrawal. Do you know any bankers? With $400K you should be able to use that as collateral for a loan. Do you own a house? If there is any equity you can get a home equity line of credit. All of these option would include some interest, and likely some minimal monthly payment, but they would be substantially less than coughing up 10% + taxes.
If you are planning to take out $50K, you would be giving away $5,000 in penalties when you file your income tax return. Even if you take a $50K home equity loan and hold it for 4 years (when this money can be withdrawn without penalty) paying nothing but the interest you will likely come out far ahead from simply withdrawing it. I would only use this as a last resort if you're talking about saving 20% interest on credit cards, and even then you might be able to find a loan of some sort.