@Scott Trench
I also like the idea that 'using a deductible 401k allows me to avoid taxes and grow my net worth faster' - but I think we are both buying into a little 'funny accounting'.
And I think @Walt Payne will really agree with this one!
If we avoid piles of taxes now, and build up a 1,000,000 tax-deferred 401k, and someone else pays their taxes now and uses a Roth, and builds up a 1,000,000 Roth - their million is bigger than our million - because we must pay taxes to access ours.
Now - assuming identical returns, it will take them 'more money' to build their Million Dollar Roth, because to make the same contributions, they must also pay taxes. But! as we pat ourselves on the back for getting to a Million using tax-deferral, they are shaking their heads saying: you don't really have a million if you can't use it without giving a chunk to Uncle Sam.
Of course this applies in many areas. Two guys who both own 1,000,000 in real estate could be in much different financial positions, if one has fully depreciated his, then when he sells, he must pay taxes on every penny, while another guy who owns 1,000,000 in real estate may only have depreciated 10,000 of it, so he could sell out with a much lower tax bill.
Net Worth is a tricky calculation if you start trying to account for future taxes - so everyone I know closes their eyes and ignores it - and it makes the tax deferral people like us feel like we are really knocking it out of the park.