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#11
For 3D and video editing the cpu you quoted looks suitable. I'm in the UK so not familiar with US prices. You can compare processor power here
PassMark - CPU Benchmarks - List of Benchmarked CPUs
higher is better. For gaming the graphic card is important. Not my thing but others here can help re gfx.
'sort of all really' - my mate used to work in a guitar shop and the 1st question he'd ask a customer was 'what kind of stuff are you into' ie jazz, metal, country etc. When they replied 'well, sort of everything' his heart would sink. Then he'd sell them a Strat copy.