[Closed] Wheres good to look for a gaming laptop?

Want to get one for my son. Needs to be under 1k, prfereably more in the region of (<)£800. I know pc's are better value but I want him to have a laptop so he's able to take it on holiday with us and not be just fixed to his desk doing his school work.

I've got an idea of spec as I have a Dell G3 15 as my work laptop so want something with a similar spec, we did used to get money off Dell stuff but that seems to have stopped now...

Not sure wheres best to look though, any ideas other than currys? Seen a website called Box, is it ok?