I'm not going to give you an "exact" number because prices can obviously vary depending on what deals you find, what sites you go to, etc.
But if you're talking about needing all of those things and you as you say want to be able to play at 1080p for at least 5 years, you're going to be pushing $1,000. This is just a VERY quick and easy guestimate from me, not putting much of your budget into unnecessary things:
So that's right around $1,000, and it probably would end up being a little more than that. To cover your 5 year request, you're going to be spending more on the GPU. Same with RAM, probably. --- i5-3570k @ 4.2ghz | 16GB DDR3 | Nvidia 670 2GB SLI | 1TB HD x2