as stated above by Math Geek, it's really difficult NOT to choose AMD at this time. They are a good performer overall and keep up quite closely with intel for a much lower price, allowing you to keep some extra money in your wallet or put that toward another upgrade in your system.
You're likely looking at a gaming rig? a Ryzen 5 3600 will suffice along side with a good Graphics Card. There are a variety of motherboards to choose from, which makes it a lot more flexible in the budget point of view, as well as getting features you want. If you roll with an AMD, you could look at the B550 boards, with newer form of hardware, which ... is not something to drool over, but definitely has a few advantage.
That being said, if you want to wait a couple of months, both AMD (for CPU) and Nvidia (for Graphics card) are releasing a new line of hardware in about 2 months time. Graphics card is a worth while wait, but the CPU is a little bit of a personal choice, it would seem it's more of a refresh rather than a BIG upgrade from the 3rd gen.