haxSins

The prices of Anker products can be quite high. But i have had my Anker cable for over a year now, and there is no signs of wear at all. They come with an 18-month warranty if you have any issues. There is also a 30-day no questions asked refund policy if you're not happy with the cable. But, for this to apply, you do need to purchase it from a authorised retailer.

i have used Anker products before, and i can vouch for them. They have excellent reviews on Amazon, so my answer is yes, its a good cable.

I use the NZXT Grid+ V2 to control my fans, but some people deem it unnecessary. SpeedFan is fairly difficult to understand, but JayzTwoCents made a nice tutorial about how to use it.

LED's have a general life expectancy of ~50,000 hours. So if you use them for 10 hours a day, you should be fine for 13.7 years

The Dell XPS 13 looks good also. Its rated highly, the XPS 15 is out of your budget, but you can always consider it. As luck would have, LTT has also done a video on this

The Acer Swift 7 looks like a good choice. LTT did a video about it if you want to check it out. Its £999, which equals roughly 1200 €

With no overclock the system should be fine, but i would buy a 600w PSU if you want to "future proof" the build, and allow some headroom for overclocking.

Do you play games that would befit from the upgrade? If you plan on gaming at 4K, obviously the upgrade is worth it. But, if you only want to play games with the 980Ti can handle comfortably, i wouldn't bother upgrading just to "stay up-to-date".

It looks ok, from what i have seen, the 480 performs nicely on Overwatch and H1Z1. I had the same choice as you, but i went for the 1060 because of preference. The RX 480 performs better than the 1060 on DirectX 12 games though, so you should be fine with the 480 for a while.

Any SATA hard drives and SSD's will be "compatible" but if you are unsure about other compatibility issues, use pcpartpicker. They have a very good compatibility check.

From past experience, OnePlus make excellent phones. I have used the OnePlus 2, but based off reviews, the OnePlus 3T is amazing. Many YouTubers (Including Linus) have done reviews of this phone if you want to check it out.

I haven't used the G900, but the obvious differences include the fact that the MX Master is not a gaming mouse and the MX Master has a scroll wheel on the side, i think this would get annoying in games as you may hit it during play. The G900 has more macro buttons on the side, catering it towards gamers. The G900 also has a more accurate sensor.

Well, i don't think you can talk about wireless mice without mentioning the Logitech MX Master. I have used this mouse, not for gaming, but it is a great pickup for general use. From what i have seen, the Logitech G900 looks like a good choice if you want to focus on a gaming mouse.

Hmm, have you overclocked the card, and maybe its not stable?

If scrapyard-wars has taught me anything, i would check craigslist. I haven't personally used the site, but i'm sure you would be able to find a cheap, old prebuilt capable of running CounterStrike and GTA San Andreas.