What is you requirement? It is difficult to say if the product in question will suite your needs unless you clearly mention the intended usage for the said product.
You can very well leverage your A320 for the 3500x, if you want a new system, do consider Intel 10400F at this range, since you will get hyperthreading vs the 3500x. I would recommend a 10400F for about 12 to 13k paired with a B460 or H410 based on your requirement for about 6 to 7K. A solid gaming system that would rival 5600X.