TL;DR: I highly recommend the i340/i350 for any application requiring a stable NIC (pfSense), with the -T2 being the most appropriate and cheapest option in most cases.  You may have seen us recommend the Intel Pro/1000 series quad port gigabit NICs, and we do so with good reason - they’re cheap and reliable.  That said, there’s a strong lack of information on them, and many of the eBay listings for one version may actually not actually be the product they describe. This post will serve as a (ve...