Critique My First PC Build

Overkill, unless you're doing heavy duty rendering. But it's alright.

i think u should get a 2 TB hdd insted of a 1 TB

It's not really overkill, it depends on the games you want to play. Even right now, games like witcher 3 if you want ultra graphics at 1080p and be able to hit 60fps a gtx 970 won't cut it. This is 1080p, not 4k and the 970 on ultra gets a min/avg fps of 21fps/43fps. On high, it will do 25/53fps. Now fast forward 3yrs where games are only likely to become more demanding and intense. What if in 3yrs you decide to move to 1440p. Maybe you know you absolutely won't, I don't know myself to be honest. I might easily decide in a year and a half I'd like to play at 1440p. If it's witcher 3, the 970 will be pushing 16/35fps on high, not even ultra. A 980 would push 21/45 on high 1440p and a 980ti is a bit stronger than the 980.

http://www.techspot.com/review/1006-the-witcher-3-benchmarks/page3.html

Have a look at these benchmarks at 1080p and keep in mind this is in current games.
http://www.maximumpc.com/nvidia-geforce-gtx-980-ti-review/

The bit about 970 is for 1080p, the 980 is for 1440p and 980ti is for 4k can be a bit over simplified which is why repetitive 'solutions' aren't always the way to go. Understandably the 980ti is more expensive than the 970. It will also likely get you through the next 3yrs (maybe longer) enjoying 1080p at or above 60fps on ultra/very high vs 2-3yrs down the line end up playing your new games at low/med just to try and keep the frames up to a playable level. It's completely up to you, if you're more comfortable with a 970 then it's not a bad card at all. If it were me in that situation with the budget for it, I'd opt for the 980ti.

The way I see it, it would take cutting back things like the 500gb ssd to 250gb. An ssd doesn't improve fps during actual game play. A year down the road if you want to install a 500gb ssd it will likely be even cheaper than they are now. If not, you're only out $175 and still have the 250gb ssd. If deciding to stick with the 500gb ssd and going for the 970 at $360 then determine in a couple years it's not enough, you're going to be looking at (provided a similar priced card is offering better performance than existing cards, the 'new' 970 of 2017/2018) spending another $360 on a gpu. Now you've got $720 invested in gpu's. That seems like a pricier component to 'upgrade' later on.

I can't say for sure what will happen in 2-3 years, with the implentation of dx12 (hopefully games start coding for it beyond just a handful) etc. Games are a mixed bag, there are games from 2yrs ago that are more hardware hungry than new games and there are some newer games that will cripple an i7 and 980's in sli. It varies from game to game.