This PC will be very cabable at 2k and even 4k gaming, using the latest Nvidia GPU, the 3070, expect high FPS with this system and with the Intel i7-10700KF you will be able to stream and game at the same time. Using a fast NVME boot drive, with a 2tb hard drive, you will not only have a fast responsive system, but plenty of space for all your games.
Part list here
Cost of parts today (30/10/20) £1,408.56
Cost to build £50
Cost to install Windows 10 and full system testing. £45
3% Paypal goods and services fee
Total cost £1,548.67 plus delivery