https://www.reddit.com/r/openwrt/comments/423rn6/best_2015_o...
https://www.reddit.com/r/openwrt/comments/36s530/better_ac_r...
Initially I was also planning to buy the Archer C7 but it seems OpenWRT is not flawless on it. This is unfortunate since that appears to be the recommended router for OpenWRT, so there is nothing on which OpenWRT works perfectly.
That was the situation 10 months ago. I'm not sure if things have changed since then. If they did, the OpenWRT has not been updated: https://wiki.openwrt.org/toh/tp-link/tl-wdr7500 According to some recentish posts on their forum there may be hope: https://forum.openwrt.org/viewtopic.php?pid=342710#p342710
I wonder if it isn't better to just go DIY ( http://arstechnica.co.uk/gadgets/2016/09/diy-homebrew-router... ) with pfSense or with the PCEngines apu1d4 and use a separate switch and access point.
Right now, it is very important to have a router with firmware you can trust and upgrade, otherwise sooner or later it will join a botnet. Therefore for me any router option without FLOSS firmware support is eliminated.
Edit: Just read the comment above about OpenWRT being dead. Looking into LEDE.
- 5ghz only worked after manually inserting the latest firmware blob for the qca9880 chip and setup only works via shell for it, setting any options for it from the web interface breaks stuff
- it's fast enough... I'm running a freeradius2 server on it, SMB shares on two 32gb USB pendrives, miniDLNA, DHCP for ~50 physical and virtual clients, a VPN tunnel to a VPS and so on. Never hits full load.
- 2.4ghz range is massive, 5ghz less so obviously...
- it is absolutely stable however, uptime exceeds two months and the only reason for shutting it down back then was a move, almost nine months before that
If you're simply looking for APs I would recommend Unifi UAP-AC-Pros though.