I have a reliable source to get whatever RP I want, so I can choose, what I want.
What is the current advise? How big is the tinkerfactor to currently get CM5 running?
It’s all software related anyways and will soon(ish) be solvable, so CM5 is longterm always the right advise?
Get a CM5 Lite (no onboard Memory) with as much RAM as you want to afford and be done with it. If you have the coice, there’s no more reason for using a CM4 in my eyes.