Hello Derek!
I agree with Ricardo, the two most important points for audiovisual works are the gpu and the cpu, and with your budget of 1500 or less you have several options that are very good, and I also recommend Ryzen, you can find the
-AMD Ryzen 7 5800X (for about 440 USD approx.)
and a gpu,
-Nvidia GeForce RTX 3060 Ti (for about 399 USD approx.)
I am also a supporter of the Nvidia GeForce RTX 3070 however this one is already around 499 USD.
so the margin for the rest of things may be affected … as I understand that you will also need to buy, ram memory, motherboard, storage, cpu cooler, power supply etc …
for the ram memory I recommend these
-Corsair Vengeance LPX 32GB DDR4 3200MHz (approximate price: 190 USD)
starting from this base you will have a good margin to buy the rest of components, if you are looking for a motherboard make sure it is compatible with these components, one that is compatible with these and enters the budget may be the
-ASUS TUF Gaming B550M-PLUS (Wi-Fi) which costs around 180 $.
although prices may vary depending on where you live, stock etc… but this is the price I found!