These three are the standard S&P 500 indexes, other than minimum investment and exp ratio, are there any reasons to pick one over the next?

I have 30+ years to invest, $10K to start an index fund, and plan to dollar cost average. Jump in now at $91 and DCA if there is a pullback from this rally? Wait for a potential pullback and then jump in with 10K? What do you all think?