Building my first gaming PC - tips

[DragonRider]

Thank you all very much for the replies!
My budget is around $570. If, for example, I buy everything except the GPU:

CPU: Intel Core i5-6400 quad core (2.7/3.3GHz, 6MB Cache, 350MHz-950MHz )
MOTHERBOARD: MSI H110M PRO-D
RAM: 8GB kit (2x4GB) Kingston or Corsair
POWER SUPPLY: Corsair VS Series VS650, ActivePFC,

That will cost me $320 (prices from Amazon for the sake of this example). That leaves $250 for the GPU. I suppose I could got a bit overboard with the GPU budget, if needed.

I'm considering either of GTX 950/960/1060/750 Ti (hooray for Nvidia)
By the way I'm finding multiple "variants" of each model. How much could those be different from one another?

Also sindroms. If you don't mind could you share your system specs? I want to take a look at them, for general comparison.