Router/setup for household with 50+ devices

[Mixeh]

As the title says, we currently have over 50 devices leeching from an ASUS RT-AC66U that has until recently been coping quite well. Clients are a range of gaming pc's(4), iPads/tablets, phones, chromecats/firetv, a handful of rPi's, printers, etc.

Does anyone have any suggestions for a decent router setup that isn't going to break the bank? I've been suggested the ASUS RT-AC5300 which, whilst appears to be spot on, is quite pricey.

Any suggestions out there?

 

[Mixeh]

What is the deal with Ubiquiti? I've never seen them mentioned before and now reading through this forum, I can see them recommended everywhere.

Additionally, could anyone suggest a guide or something similar for implementing a solution using pfSense?

Cheers!