[H] AC Router

[Winterlight]

Is AC wifi ready for prime time, or is it too early to buy AC 
routers. Does the adaptor specifically need to support AC? I am 
looking at  the ASUS RT-AC66U Dual-Band, and the NETGEAR Nighthawk 
AC1900 Dual . Is there a preference?  I am drawn to the Netgear 
because they are a network hardware company, and I have a number of 
Netgear switches. Comments or warnings?