Kong has posted new dd-wrt firmware for the WRT1900AC that's worth a test drive:
http://www.desipro.de/ddwrt/K3-AC-MVEBU/
I'm using it now, and it is doing well. I've had some problems with dd-wrt for this router in the past, but this release has a new Marvell wireless driver in it with some fixes for wireless-ac connectivity and is working well with my variety of wireless clients. That includes Apple mobile clients, Roku, wireless desktop, etc. With dd-wrt firmware you get...
New DD-WRT firmware for the WRT1900AC
http://www.desipro.de/ddwrt/K3-AC-MVEBU/
I'm using it now, and it is doing well. I've had some problems with dd-wrt for this router in the past, but this release has a new Marvell wireless driver in it with some fixes for wireless-ac connectivity and is working well with my variety of wireless clients. That includes Apple mobile clients, Roku, wireless desktop, etc. With dd-wrt firmware you get...
New DD-WRT firmware for the WRT1900AC