If you've already got a Ryzen 5 1600 the best improvement is going to be the 1800x... but it isn't going to be much in any aspect. Even going to a 2700X would be a small upgrade. The 1600 is still a darn good CPU and more power than you need for just about anything.
If I were you I'd hold out until the 3000 series based on Zen 2 release sometime next year. That should be a more substantial upgrade.