Not sure if I should even upgrade. Currently have an Asus 68U. I own a two story home and the router is upstairs. I do large file copies between wireless and wired PC's. The differences in USB adapters has been unreal. My netgear 6210 has been the best wifi adapter I have used. I just ordered the A7000 AC1900 adapter. Is there any benefit to stepping to a newer model router? Looking for best transfer speeds possible between my PC and one that is wired to the gigabit switch.