[0]: http://www.balticnetworks.com/maxxwave-routermaxx-6-port-gig...
[1]: http://www.aerohive.com/products/access-points/ap330.html
OP used Ubiquiti APs, directly managed from the homebrew router. Seems a sensible solution.
They generally use the same cards, it's having proper antennas that makes the most difference.
I live in an older apartment complex which was build in early 70s and there is only very poor copper connection, so I can get at most 8Mbs in through that. Slow speeds have forced me to look for alternative solutions and 4G LTE is the way to go here, it costs just shy of twice my old setup, but I get 80-100Mbs in and out, which is 10 times as fast, but being on 4G means I can need my router/modem/thing to be 4G enabled and while my main PC is connected to that router via Ethernet most of my devices use WLAN (things like chromecasts, phones, tables, and laptops).
Maybe I'm in very tiny minority here, but just saying things aren't always as simple.
So the only product is a combination router+wifiAP. Or the only way to have a stateful firewall in ipv6 is to have stateful firewall+NAT like in ipv4.
Its generally pretty easy to buy a stand alone WAP and configure it to be a very simple bridge to the existing network and call it done.
If you have kids, buy two, connect the kids devices to the second AP, and control its power via various methods (timer, home automation, whatever). This is a trivial way to enforce "homework first, toys like ipad second", or enforced bedtimes or whatever.
Note that this kind of misconception is limited solely to the networking world. The fact that TV+VCR combo devices exist made no one think its impossible to have stand alone TV and stand alone VCR.