If you can get copper get it. No wireless competes with copper. I use and dig Obi also, though not for my gaming PC which is on copper.
Some mesh systems are better at speed than others. If you do go mesh take that into consideration.
Build a tower with him.
Asus mobo, AMD Ryzen 7 3700x, EVGA/Corsair/NZXT/Seasonic Power supply @ 650-700W, NZXT H510 series case, GPU AMD RX5700 8GB, at least 16GB of mem, and a 2K monitor with Freesync. Solid machine with legs and an easy to build in case.