I made the switch to the R5 when it was first released and have been very pleased. It's a fantastic camera.

I know Brant (Kayaker) is also using the R5 primarily.

With the adapter it can utilize all your EF lenses perfectly so you might re-consider selling the EF 24-105. Not sure if the RF 24-105 is any better. The only RF lens I own is the 100-500mm.

The battery grip is worthwhile for extended shooting.....I have used it many times all day with plenty of battery to spare.

You will love it!