Need hardware advice - building new PC / cheap workstation

[racerx11080]

Hi, this is my first post to this forum, and if I am doing anything wrong, please let me know, and I will give my best to try to fix it. I would like to thank you guys firstly to be such a great community, although I didn't take part in your discussions, I've red many of your posts and they helped me a lot.

Although I am still a 3d Coat newbie, I have some previous foundation in drawing and concept designing, so it didn't took me long to realize outstanding power of this software, and I've decided to incorporate, to be more precise to MIGRATE majority of my work to it. But unfortunately, my PC does'n handles 3D Coat the best, so I've decided to build a new one, since this one has more then 7 years. 

So, since I don't know anything (almost) about computer hardware I've started deep search on NET and among other forums on this one about my future build. But majority of reviews is for GAMERS, and I wont play games on this PC, it will be semi-professional work station for: 3d modeling (3d Coat, MAX, Skethup, zBrush), Unreal engine, Keyshot,... Photoshop. So, since I don't have enough money to buy best equipment, I would like to ask you for your advice: what is the best value for your money today for: CPU, GPU, motherboard, how much RAM? to be able to perform with ease concept designing and visualization. 

My choices were GTX- 970 - because I've read somewhere about cuda cores, but few days ago on this same forum I've read that they are not playing that important role at all, so I am totally confused now, and I don't know should I think about R9 390 also?

For CPU I was thinking about I7 4790K, but then I've heard about RYZEN few months ago, and I am even more confused what to choose now for CPU then for GPU.

 

So, please HELP ME, and give me some advice. Thank you in advace