The price doesn't matter, but it is best to be as cheap as possible and it only needs 40fps for medium settings in gta5 (when streaming)
In the price-performance ratio I can only suggest the one here:
https://www.amazon.de/...07YF1R2FS/
It should meet your requirement.
I say, in principle you only need a laptop with which you can play smoothly. Any computer that does that will do the rest… So look for good gaming notebooks.