When Netgear teased a next-generation cable gateway with 802.11ac WiFi, it seemed like a natural fit: WiFi that was a perfect complement to 100Mbps-plus internet speeds. Its new D6300 (not pictured here) isn't necessarily in quite in such equilibrium, depending on just who you have as an internet provider. The hardware is billed as the first ADSL modem and router combo with 802.11ac built-in, but you'll need to use the gigabit Ethernet WAN jack wi
