Help me choose a laptop

So I am looking to purchase one of these laptops. The price isn't an issue, as I will get a laptop coupon from my work, reducing the final price around 800€. They are all similarly priced (omen 1475€, swift x 1234€, predator 1291€, legion 5i 1328€), I am looking for a laptop for work and for gaming of course. I'd like the screen to be gsync-freesync and to be able to upgrade the ram. Please guide me through this