@w0w You can also run Squid on OpenWRT I am told there is so many packages I have been playing with OpenWRT because TP-Link was doing so weird data harvesting and pfsense caught it in the act after I just installed openwrt per @johnpoz recommendations. I just run it in bridge mode now

The HG612 will be plenty fast enough if it works, it doesn't really do anything but pass the traffic to pfSense. I think you will need it unlocked to change to bridge mode. That's quite easy though. I hope it's the 3B version. Some of the earlier ones had known over heating issues. Steve