Jennypenny, I hadn't looked at the asset protection side of things for those assets because ERISA accounts are fully protected. I think the protection from creditors is the same for 403b, 401k, and IRA, but the difference is in issues of spouse and inheritance. Perhaps I'm wrong about this. As I have only ever had one spouse, am still married to her, and have one very young child by my current spouse, it doesn't seem to matter much presently.
I worry far less about my wife and child arguing about what was once "my" money, than I worry about the idea of a creditor seizing my assets. I acknowledge that in terms of probability it is probably more likely that my heirs will argue over my estate than it is that someone will seize my assets, but the difference in the scenarios is pretty self evident.
As for the annual fees, so much as I can figure out from my cursory investigation of the fee structure, the fees seem to be a percentage, and the fees are relatively low all around. I chose the funds with an eye on the fees to begin with though.