some people like mid range zooms, while others like primes.
it's a matter of personal taste and photographic style.
personally, a fast 50mm prime and a few steps forward or back will give youth the equivalent of 24-70.
F/1.2 or F/1.4 is a lot better than F/2.8 if you are shooting in low light.
I think you need to try both a 50mm prime then a mid range (heavy) zoom and then decide which you'd be happier walking around all day with
I'm serious about selling the 24-105 so if you are interested, ping me before I put it on EBay.