My hackintosh is 2 years old and gets 17492 points in geekbench, cost around 2200$!

I would go with the a7s.

I shot a neo western with a C100 and Ninja Blade, and the look is made afterwards with filmconvert or other software and considering this, the a7s gives you loooots of dynamic range and the image quality is second to none. Also keep in mind the stunning Noise performance!

Cheers.