Hi Paul,
The SMB RV series routers will do PPPoE. Currently there are no SMB Routers that have wireless AC.
The only SMB device that has AC is the WAP371.
The RV320 Dual-WAN router can handle up to 25 VPN users and up to 30 NAT static addresses.
It does not have built in wireless so you would need a WAP, but it is more robust than the other RV Series routers.
Here are the specs.
http://www.cisco.com/c/en/us/products/collateral/routers/rv320-dual-gigabit-wan-vpn-router/data_sheet_c78-726132.html
WAP371 Wireless-AC
http://www.cisco.com/c/en/us/products/collateral/wireless/small-business-300-series-wireless-access-points/datasheet-c78-732143.html
Also watch these videos to see how it is setup.
https://supportforums.cisco.com/community/5951/small-business-routers#quicktabs-community_activity=3
Regards,
Chris