Not OP, but I've been very happy with a $60 Buffalo N300, running since 2015 with no issues. I run DD-WRT on it, 200 Mbit symmetric fiber uplink, 3 devices connected via ethernet and the rest via wifi covering the whole (wooden) house, and I have port forwards for ssh and https to the server in the garage. Does everything I need and more.
I've been looking for an excuse to go down the Ubiquiti route, but I really can't find one.
The TP-Link Archer C7 has long been one of the best choices for an 802.11ac-capable wireless router, due to being well-supported by OpenWRT. It's currently $75. The only downside is that the CPU is a bit slower than the EdgeRouter X (though faster than the other EdgeRouters), so I looked on WikiDevi [1] for something with the same CPU as the ER-X. Out of the dozens of options, I picked a recent mid-range D-Link and found it listed for $89.99 on Amazon, though I didn't check for OpenWRT support.
I'm personally using a TP-Link Archer C2600 that was on sale for $70 from Newegg in January.
In the end mucking with open source firmware, while interesting, just wasn’t worth it. I found the ubiquiti solution stable and the UniFi management software (especially their iOS app) are excellent for my needs. Plus mounting my AP in the ceiling means I can cover the entire house from one AP and at the same time keep the rest of my networking equipment stored away in the basement.
I've been looking for an excuse to go down the Ubiquiti route, but I really can't find one.