I decided to go all Canon
The 24-70 f/2.8 seemed like the best choice, especially with its 2.8 and great optics. But the price was a bit steep and it's quite heavy.
If I went with Sigma or Tamron, I could get a lot more lenses for my money. But sometimes I am a brand whore and it feels a lot better to have Canon on Canon. Then I know that everything works together, is made for each other and is of good quality
I finally went with the
Canon EF 24-105 f/4L IS USM. When I tried it, it was great and didn't feel very heavy. Could walk around with it all day. I will also take a lot of pics from my kayak and I think the IS will come in quite handy there.
I will also get a
Canon EF 50 f/1.8 II.
I think it will be a good start. Thank you for all your help