A month and 1/2 isn't necrothreading, right?
In my new HA build (a new home), I am using the Unifi Security Gateway (USG), 24-port-(non-PoE) switch, and 2 Ap's (soon to be 3 AP's).
Plugins running include fingscan, unifi, and pibeacon (thanks Karl).
The non-PoE 24 port switch runs very quiet in a relatively hot enclosed rack for me. I THINK i heard the fan turn on once, while booting, but I may have been hallucinating. So far, I am very happy with the ecosystem. The extra $50 for the switch is worth it for no other reason than it shows up in the Unifi controller web-ap/iphone app, and the apps provide me valuable but simple information (like what devices are on what port). I don't believe I have any need for VLANs, though I like the option.
For devices that need PoE (4 IP cams and the Unifi Cloud Key), I connect the cams to cheapo PoE switches off Amazon that connect to the Unifi switch. The Cloud Key goes directly to the switch and gets it's own power supply. I know, I know, not good network topology practice, but the cams go to a switch on which their DVR is located, and the cams are not accessed by any mean other than the DVR (cutting down on high-bandwith video going upstream to the main switch or USG. The AP's just use their incuded charger.
I'm strongly considering adding an rPi to the outgoing ethernet on the AP's to use pibeacon and temp/humidity/pressure sensors, but I don't think the voltage gets passed through.
Sorry for rambling. Hope I addressed your question somewhere in there.