Help finding Reliable cables and NIC

[Turretgaming]

So I have my server in my attic and modem and router there too. All the networking goes there from every room. It's all cat5e to the rooms except for my room and my office (one has work PC and other my gaming PC) which is cat6a. I use the gigabit ports on the Mobo to the 24 port 10gigabit switch which it 10gig copper. But my transfer speed to the server is maxed at 10 megabytes per second (100 megabits per second). My servers Mobo has a 100megabit port so I need a NIC that's rj45 and capable of 10 gigabit or at the very least 5 gigabit using LAG from a 5 port NIC. On top of all that I don't trust the cables I bought on Amazon or at Staples and I want to know what brand is the best and where to get good cat7 and cat6a so I can redo the house with cat6a and my room and office with cat7. I know it's over kill but come on.... Who wouldn't do it if they could ☺️