We need more info. Future proof is not possible with any budget unfortunately but we can recommend the best for your money currently certainly.
Do you need a monitor included in the price? If you already have one what resolution is it?
Are there particular games you would like to play, or is it a bit of everything?
Are you willing to build it yourself or is your heart set on something pre built?
Why do you specify AMD? Does that mean you dont want an Nvidia GPU for some reason? The new Intel CPU's are also looking very good for gaming.