Following up to my earlier post, I'm entirely happy with the Apple Airport Extreme boxes as APs. I don't yet have any 802.11ac clients with which to thrash them, but 802.11n over 5GHz is consistently getting me close to the rated maximum speeds when I'm in the same room as the AP. Also, I haven't had any of the weird problems with my Nests that my older APs seem to have induced (allegedly because Nest uses some sort of low-power mode that Apple groks correctly and other APs don't).