Guizmo,
I love the idea of maxing out your 457! My wife and I also fully fund our 457 accounts along with our 403b plans. As mentioned in other posts, 457s are great because they are not subject to early withdrawal penalties. When we leave our jobs, we will tap these funds for living expenses. Since we try to keep our income within the 10% bracket, we usually pay very little federal income tax.
We try to load up our various accounts in this order: 457, 403b, IRA, HSA, and Coverdell ESA. So, from Jan. to June we funnel most of our paychecks to the 457. By maxing out our 457 accounts, we'll have $42,000 pile of money that can be used for living expenses when we "separate service." ($42K = wife's $18K and my $24K, I'm an old fart who gets catch-up contributions)
Good luck hitting your goals! Ed