Braintwistah

Recently got a M18x R1 off eBay for my daughter but I plan on upgrading to the “max”. From what I understand best cpu is the 2960XM and the best ram would be 32GB(1600mhz) but for the gpu I can’t seem to get an idea on what the best gpu I can put in this is there’s a lot of info here but I can’t exactly find a clear answer as what to get my choices I’m thinking of is a 980m or a rtx 3000 more so leaning the rtx route. Any help is appreciated thank you.