Ok, now we're getting some where! Gaming it is, and you've defined your scope by selecting an I5 processor. Nothing wrong with the I5 for gaming at all. It won't be much behind the I7...but (there's always a but...)...if for any reason you think you will want or need to benefit from multi cores for software that will use them, I would still recommend to err on the side of the I7.
Yes, the I5 and the I7 are both quad cores, but the I7 utilizes hyper threading. Basically, quad cored I7 can run 8 threads. The I5 does not use hyper threading so 4 threads are it. The price difference between an I5 and I7 isn't a lot (for the lga 1150 based units).
I7-4790K - $339
I5-4690K - $229
That extra $110 gets you a faster clock speed and hyper threading. If you consider the overall cost of the system, an extra $110 isn't much, but if you really don't have, or don't think you'll need the hyper threading then perhaps it isn't worth it.
Since gaming is to be your prime thing, I would seriously recommend at least the GTX 970 over the 960, especially considering the games you've mentioned. The 970 is only about $100 more and is quite a step up in performance over the 960. If nothing else, you could forgo the extra $110 on the CPU, get the I5 and spend that extra $100 on the GTX 970 video card. An I5 with a 970 would be better than the I7 with the 960 for gaming...for roughly the same price.
The Aerocool or the Raidmax case looks nice and that looks like a nice price too.
ok, so I had a look at your site in the UAE...ouch!! Yeaaahhh...just a little difference in pricing over there on the video cards, at least when converting Dirham to dollars.
The MSI GTX 970 on that site is 1650 AED...that's $449 U.S. dollars at the current exchange rate. That same card here at newegg is $309.99 (after a $20 rebate promotion going on right now). However, that same high price holds true on the GTX 960 as well, so it still makes sense to go with the 970 over the 960 for gaming.
On the good side, the CPU's seem to be more on par. The prices and the price difference between the I5 and I7 there are similar to what they are here.