Just browsing around and found some info for new AC routers coming down the line and these things look like monsters.
FYI: Prices = *
Specs are pretty similar between them as they seem to be on the same platform.
CPU: 1Ghz Dual-Core (R700) 800Mhz Dual-Core (Linksys & Asus)
WAN: 1x 1Gbps (Asus can do 2 by taking one of the LAN ports and creating a second WAN from it. Failover or Load Balance)
LAN: 4 x 1Gbps
2.4G: 3x3 - 600Mbps (B, G, N)
5Ghz: 3x3 - 1.3Gbps (A, AC, N)
USB: 1 x 3.0 and 1 x 2.0
So anyone thinking about upgrading to AC finally or sticking around with your N devices.
* = expected though, bought my Linksys E4200 for $200 in 2001