Go with a 512GB SSD (highly recommend Intel SSD or M.2)
Go with a midrange (not extreme) i5 or i7 that you can over clock down the road (this is exactly what I did with my 8 year old gaming rig)
Go with 800-1000W PSU (2-300$) , I strongly advise Platinum level or above.
Go with a mid range GPU that you can SLI or XFIRE - this means you can DOUBLE UP on GPUs down the road instead of replacing one. It wont give you 2x performance, but 50% is common.
Go with an open case concept as this will SIGNIFICANTLY reduce the total noise and the heat inside the system. Your GPU fans will hardly have to run.
Go with 1500-2000$ and do it right long term. 1000$ is not really feasible and you will just end up tossing it down the road.
I modded Mistus part list.
https://ca.pcpartpicker.com/list/xWqrYH