What computer should I buy?

Hello everyone!

I'm looking for a really good laptop for video editing that isn't from Apple. It can be expensive if it's the perfect one.

I don't know a lot about computers but I need a great screen, graphics card, processor (Intel Core i7?) and memory. If it's not too heavy or too big that's even better!

I use Premiere and Lightroom a lot, and will maybe work on Photoshop, After Effect or Indesign too. I want a laptop with room for the next video and app's updates  so I don't have to change it soon.

Is the Dell XPS 15 a good option? Or a Thinkpad?

Thank you for your answers...