Gave a quick look using lolirock rom not the stock rom, found that only marvel future fight is marked incompatible, but did not find "all 4" or "now tv" at all searching the play store, kodi works great (I've run 15 and now run 16 beta) and all the add-ons I've tried work fine.
I mostly use it with kodi to stream movies from my nas, I use a 1gb usb eth. adapter witch gets 20mbs download vs 10mbs with 10/100 usb eth. and 5 mbs for the 5ghz wireless.
As far as fire tv, I almost went that way (until I found the nexus for $40 the same $$ as the way weaker hardware in the fire stick) and my deal breaker apparently there or no 3rd party roms for fire, so if like me and you hate the nexus interface you can dump it for a stock android, myself I've never NOT gone 3rd party roms for my phone/tablet ect and not having that option is a deal killer 4 me..