I've been running pfSense for many years and have tried a lot of different modems with it.
The Vigor130 is the simplest just plug it in and it works solution, however it is expensive and in my experience tends to sync slightly slower than other devices that use a Broadcom chipset, also some people have reported odd problems with random PPP session drops on DrayTek modems and routers since Plusnet changed over to their "New Network" a couple of years ago.
Currently I'm running a Billion BiPAC 8800NL configured in BRIDGE mode and the WiFi switched off, this makes the device appear like a PPPoE modem, and I'm slightly preferring it over the Vigor130.
As it is, I can simply swap the ethernet cable from the pfSense WAN port between the Vigor130 or 8800NL without any other changes (other than the corresponding RJ11 phone cable), so I can do a side by side performance comparison, and have a backup modem always in place.
I bought my Vigor130 new on eBay and I was very lucky to get it for £30, but usually they go for >£45.
In comparison the last 8800NL sold on eBay in "as new" condition, went for £18, I got mine at £20.
My only other thought is the physical location of the connectors coming out of the devices, the Vigor130 is great at it can lay flat or be wall mounted, whereas the 8800NL is still a nice compact box but can't be wall mounted as the thing stands upright with the connectors pointing backwards. This shouldn't be a problem for most people, but my entire system is wall mounted - so the 8800NL isn't physically ideal for my current setup.
Both DrayTek and Billion have provided very fast and comprehensive technical support, and I've been sent revised firmware for the respective devices within days of reporting minor problems with their code.
