I just got my first "big boy" job at the tender age of... 34, after a long time in academia and a startup stint that worked out pretty well (startup got acquired by public company) - so now it's the first time I have the option to contribute to an employer-matched 401k. There is a good selection of Vanguard funds (both target-date and mutual funds) and the default selection is the target-date 2045 fund. Since I am starting late, I only have a few thousand dollars stashed away in a Roth IRA with no other retirement savings, and I am planning to aggressively fund the 401k in order to catch up.
Do you recommend I just allocate 100% to the 2045 fund, choose the 2050 fund instead (I understand that it takes a while longer before it starts switching to more conservative selections) or add a percentage of VFINX too? (10-20% of my allocation?)