Upgrading wireless on Inspiron 15 (i3543-2501blk)

I am having intermittent Wi-Fi connection issues and I am ready to drop kick this laptop. I has spoken to Dell Tech Support and they want me to send it back to them for 7-10 days. However, they are just going to put in the same type of card. I would like to get the most out of my wireless. My router is an Asus RT-68U dual band AC. Can someone tell me what upgraded wireless cards have been tested as compatible with the Inspiron 15 (i3543-2501blk)?