Yea, my biggest problem with my employer 401k is that I can't just invest in a Vanguard low fee fund, but I have to use their 401k management to get my matching funds.
I wonder where the inflection point is where you are better off investing after tax.
If you're selecting lowest fee fund within specific classes, that will probably serve you relatively well...of course then you need to weight the fund classes. How do you handle that decision?