I've finally moved into the 21st century with an Asus RT-N66u router. I've set it to have 2.4GHz and 5GHz with the same SSID so that each client can automatically choose whichever has best signal. The 2.4GHz network is on "Auto" mode, which I assume means b/g/n. The 5GHz network defaulted to a/n, but I'm wondering if I should change it to n only. I don't have any devices that require 802.11a. Would disabling "a" provide any benefit?