Building An Editing Laptop, And Need Advice On RAM, GPU And SSD

Hey there!

I'm building an editing laptop which will be used to run Premiere Pro, After Effects, and Davinci Resolve. I'm willing to invest a bit of money to make it powerful and long lasting, and wonder if you could help with the following? 

RAM: I have the choice to install either 64GB 2666MHz, or 32GB 2933MHz. Which would be better?

GPU: A choice between RTX 3070 and RTX 3080. Is the RTX 3080 worth the extra money, and more likely to keep the machine competitive for longer, or are the differences negligible?

SSD: I have the option of installing two M.2 SSDs in the laptop. I was planning on using the first solely for the operating system and applications, and the second to store media and cache files. I'm looking at either the Enmotus Fuzedrive or the Samsung 970 Evo Plus. My thoughts were to use a 900GB Fuzedrive as my primary start up drive, and the 2TB Samsung 970 to store the media files, but would there be an advantage in a different combination?

Many thanks in advance! Andy