bunchanumbers on 26 September 2016
Go for the slim. You said you want the games. Sure the performance is better on the Pro but in the end, that is just minor little details and you don't have a HDR 4K tv. If you want the games themselves and don't care about the bells and whistles, get the Slim.
For the price of the Pro, you could get the slim and 5 of those $20 games. That would be most of the games you want outside of new ones coming.
