Modded or vanilla? I would say grab a 4690k, GTX 960, 8GB RAM as the core, and build from there.
omg, at least give some sign that you are trolling. you could confuse the boy.
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minecraft isn't that hard to run, you can easily spend less than a grand (you could run a server for a grand, probably).
the two issues are:
what can you get for a grand (because life doesn't end with minecraft) and
would you rather spend less or more (sonds stupid, but bear with me)
you can get a monster PC for a grand. will play GTA, witcher 3, etc. is that what you want ?
would you rather have a system that can run minecraft easily, and other games occasionally without being an expensive monster?
my suggestion is to go for a midrange Intel system, starting with :
http://pcpartpicker.com/p/HYnZK8
this will run pretty much anything short of those titles designed to showcase new graphic technology, and even then it will run those at *slightly* diminished detail.
$680 (without a monitor)
you can pimp it up if you want, but it comes with a R9 280 which is WAAY more than what minecraft needs.