discusses a little bit taxes before and after retirement. It appears that for a high wage earner who lives well below their means that the tax savings now is a win.
The articles that I have read of a high wage earner benefiting from a Roth 401(k) sort of assume a high consumption lifestyle during retirement.
If you will live on 35% of your pre-retirement income, you will have significantly lower taxes in retirement.
Furthermore, as high wage earner and ueber-investor, you will have significant after-tax investments that you can use in retirement. Withdrawal from those investments will be taxed less as well because some of it will be return of principle and right now both capital gains tax rates and qualififed dividend tax rates are lower than your marginal income tax rate.
Finally, you can always convert some funds to a RothIRA in the future when your tax rate is lower.
I have seen no calculator that takes all the above into account. If you know of one, please point me to it.