New WiFi card for Dell laptop

[googlemad]

Can anyone recommend a decent wireless card that I could fit in my Dell 15R SE (7520) laptop? I would prefer an internal card to a dongle and no longer under warranty so happy to open it up and swap it out

 

At the moment I have the factory Intel Centrino Wireless-N 2230 which seems to have odd problems now and again under Windows 10. Ideally a replacement would be dual band too as my router has both 2.4ghz and 5ghz