I have the XPS 13 9343 (July 2015) and I need to replace the wireless card (WiFi & Bluetooth). I have found recommendations for and against Intel 7260, 7265, 8260 & 8265. Not sure which one I should buy/use. Since my unit is five years old I need to make sure a new card works with older h/w. Please re-direct me if this is not posted in the appropriate catagory.