http://www.amd.com/en-us/press-relea...2017mar02.aspx
The one that we talk about is R5 1600x it is probably the best price/performance of the bunch.
The R7 1700x is also pretty good as it adds 2 more cores and 4 more threads but also drops 0.2 on the clock speed.
So basicly the i5-7500 is all you need for gaming BUT for anything extra you do during gaming or heavy tasks after gaming like vidio editing and stuff you want more cores so R5 1600x or if you are going to focus more on that and multitask a lot and can afford the extra price of R7 1700x then go for it.