What is the absolute best all-around lens for the R5 Mark II that wont make me regret spending five grand on this body? I am honestly so frustrated right now because I just upgraded from my old 5D and I've been trying to use my old EF 24-70mm with the adapter but it is just so clunky and the balance feels totally off and half the time the autofocus is hunting which basically defeats the purpose of buying this high-tech beast of a camera.

I am leaving for a big trip to Japan in like three weeks and I am genuinely anxious that I wont have a setup that works by the time I hop on the plane. I need one lens that can handle everything from street photography in Tokyo to some portraits of my family without me having to swap glass every five minutes because my bag is already gonna be way too heavy. My budget is around $2,500 maybe a bit more if it is really worth it but I just want something that stays on the camera 90% of the time and actually takes advantage of that new sensor.

Is the RF 24-105mm f4 enough or am I gonna miss that extra stop of light? Or should I just bite the bullet on the 24-70 f2.8 RF? I keep reading conflicting reviews and my head is spinning trying to decide if the weight trade-off is worth the cost and im worried about making the wrong choice again...