Just as Ipwn mentions it is difficult to find a gaming laptop for under 1000$. My advice would be to either save up money for a laptop with higher specs or simply make the best with what you've got right now. My experience with Minecraft tells me that no high-spec computer is needed. Go for a medium graphics card, medium processor and not more than 4GB RAM. You won't be needing more than that in my opinion.
I personally prefer gaming on a desktop. Bigger screen and better cooling. But if you want portability go for a laptop with the specs mentioned before in this thread.
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