Also, take a look at the resources of smallnetbuilder if you are interrested in learning more, they have a decent amount of testing and articles regarding mixing devices from different standards, how it should be setup, etc.
For the record, I just threw out my old netgear prosafe AP102 G-access point and have bought a Asus RT-N66U to replace it, gonna run it in pure AP mode and not use the router so I felt that the high price of the AC66 or AC68 was way to much considering the below articles and the fact I dont have any AC devices yet. When I finally get some AC devices, I bet I can still buy a new AC AP or AC router and have in AP mode for the difference between the Asus N router and the current AC models available.
Anyway, I'm actually unpacking the asus right now, so gonna be interresting to see how it works considering my day job involves running networks including wireless cisco ones based on LWAP and hundredss of access points. Although I wanted to get a nice Cisco at home, I cant justify the cost for having a laptop and an iPad on it every now and then.
802.11ac: A Survival Guidehttp://chimera.labs.oreilly.com/books/1 ... index.html
A few Smallnetbuilder wireless resourceshttp://www.smallnetbuilder.com/wireless ... on-or-hypehttp://www.smallnetbuilder.com/wireless ... l=&start=2http://www.smallnetbuilder.com/wireless ... -revison-7http://www.smallnetbuilder.com/wireless ... -a-bridges
Also look at the various reviews, seems Asus routers with external antennas has a very good coverage, which is why I went that route.