I'm looking to upgrade to an AC router. I've got several AC devices, 5ghz N devices, and some 2.4 devices. I can get the AC68P for $180 and the EA9600 for $200 ($250 with $50 rebate card at Staples). I like the idea of having the 2 5ghz bands on the EA9600 but don't know if the $20 difference is...