My point here is that every lens has its tradeoffs. Some trade performance for cost. Others trade utility for ultimate image quality. What lens is right for YOU is what you need to work out.And of course the 24-105 is much superior to the 24-70 from 70-105mm I rarely shoot from 24-35, so the extra reach is valuable to me. ymmv.
If you're going to be taking casual travel photos that occasionally show distortion effects (like your shot here) it's probably better to err on the side of utility (like you've done with the 24-105). What good are perfectly straight lines if your dog runs off while you're trying to change lenses??This factor is oft-undervalued. My son is always in motion and rarely looks directly at me, so I personally need responsive AF and short shutter-lag, neither of which I get on my 5D2 :-/
Don't try to force a tool to do a job it wasn't made for....That sounds like a country song ^_^