fwiw there's oodles of cheap, used 10gb expansion cards on the market these days if you got a spare PCI-E slot (just search ebay for like the mellanox connectx-

fwiw there's oodles of cheap, used 10gb expansion cards on the market these days if you got a spare PCI-E slot (just search ebay for like the mellanox connectx-3 or connectx-2). Switches with 2+ 10gb ports are also quite affordable now, too, like the CSS326-24G-2S+RM which has 2 SFP+ (10gb) ports for $140. Cheap enough to get you a NAS & a primary PC on 10gb anyway. 10GBaseT is still super expensive, though, unfortunately.