They are mainly streaming (some HD) video on win8.1 desktop system. They just purchased nighthawk router.
However the desktops built-in wifi AC adapter according to them was dropping 5ghz wifi connection.
Yesterday I installed el cheapo usb n dlink adapter for them. However to avoid further late evening support calls and headache I would like to buy them something more solid 
Would one of ASUS PCE-AC56 or TP-LINK Archer T8E AC1750 PCI-E cards do the job?
Are there any other recommendations? I know running a wire would solve all this headache but it is not an option at this point.
Thank in advance.
However the desktops built-in wifi AC adapter according to them was dropping 5ghz wifi connection.
Yesterday I installed el cheapo usb n dlink adapter for them. However to avoid further late evening support calls and headache I would like to buy them something more solid 
Would one of ASUS PCE-AC56 or TP-LINK Archer T8E AC1750 PCI-E cards do the job?
Are there any other recommendations? I know running a wire would solve all this headache but it is not an option at this point.
Thank in advance.