Nice build, you should look into 24pin and gpu cables that are rgb, I use the asiahorse 24pin mesh and I also got the normal 24pin rgb from both asiahorse and lian li, same with the gpu cables. But asiahorses 24pin mesh cable is something that my eyes never get tired to look at. Also in the future u know that lin li has a airflow case now that is super duper for cooling and so nice looking.
You could screw the tabletop on but you would see the nails on top and you could potantially scratch your hands from the nails sticking out in the drawers