I picked up the 8 port version from Microtik and picked up a Mellanox ConnectX-2 of eBay which came with a pair of 10G SFP+ fiber modules. A 10 meter single mod

I picked up the 8 port version from Microtik and picked up a Mellanox ConnectX-2 of eBay which came with a pair of 10G SFP+ fiber modules. A 10 meter single mode LC fiber off Amazon was like $20. As for the NAS, I snagged a Supermicro mini-ITX 8-core Xeon D (Broadwell era) board from eBay as well for like $400. It brings out the dual integrated 10G NICs on the Xeon D, a PCIe 3.0 x16 port, a 4 lane M.2 port, and 6x SATA ports, 4 slots for DDR4 ECC RDIMMs, and an ASPEED based IPMI. Adding 64 GiB of RDIMMs, 6x 10 TB WD drives, and 2x M.2 drives on a bifurcating riser made for a killer NAS and VM host (crammed inside a Fractal Node 304)