Yes, 10GBASE-T copper SFP+ module meets the SFP+ spec, but it is not meeting 10GBASE-T official spec. Vendors like fs.com offer it at US$ 380, which is more expensive than the reqular fiber SFP+ modules ($16).
I have bought optical transceivers from ebay, but not the one listed above. They are working great but recently buy compatible sfps from fs.com, it seems that they are more reliable and cheap. Generic Compatible 10GBASE-SR SFP+ 850nm 300m DOM IND Transceiver
I am just a junior fiber optic technician for a small company, would you mind if I ask why do you need so many cables? For me, I only buy the new cables when needing to upgrade my network or replace the old ones.
The difference between active and passive copper cables is the length and signal strength.
Passive twinax cables is being used between the server and the Top of Rack (ToR) switch within 5m. The upside in this configuration is that the passive twinax cabling connection is much cheaper than the...