Hey i'd love to help you out here man.
You say you want to run things on high settings and have a smooth experience, gotcha. So this kind of heavily depends on what games you'll be playing. I think you can pretty much have a fairly smooth experience in this budget.
few questions
1)is your Monitor/ computer peripherals included in this budget or do you already have those?
2)Which games will you be playing? (Depending on what you get most of the triple AAA or fancy graphic games will have higher demands and you will not be able to have a smooth experience on them depending on your gpu)
3)Do you care about future upgrades/ want to leave room for upgrades in the build?
4)What kind of performance will you be expecting out of this build? Will you want to play any graphically demanding games that are coming out or any titles you're looking forward to playing?
5) Do you care about anything other than gaming with this build?