Im not 100% savvy when it comes to the workstation cards, ive heard fire/quadro have their strengths and weaknesses just like with their consumer cards.
The GTX and other consumer cards will work, but workstation cards do a much better and faster job at rendering raw data
I would highly recomend sticking with Intel for whatever it is you choose, I know AMD’s cheaper prices and their 8 core FX series seem tempting, but they hardly hold a candle to an i7’s rendering power
I would most deffinately get 16GB of ram as well more if the motherboard you get supports it and you want to shell out the extra money