Yes, I would recommend EVGA GeForce GTX 1060 6GB's and it would work well with your i5's and SSD's so you can save some money and also I am so impressed on your plan that you will scavenge some parts of the machine so you can have some spare for that. Good Luck on your setup!! 
EVGA offers a $299.99 unit that's a full size card with 2 fans or the EVGA (SC) which is only $274.99. The clock speeds and other things are identical, but I feel that the larger card with two fans is preferred. Is that correct?