I plan to put away just enough to stay out of the 25% federal tax bracket, about 13k this year for me. I can't front load, because my company does NOT true up the match. If you miss one pay period, they don't match at all. That is too much free money to ignore.
I am also saving for years 1-5 of early retirement, otherwise I would throw EVERY DIME I could at pre tax accounts. However, I am saving in taxable accounts since I will need these soon for early retirement until my Roth conversions are complete.