I haven't read any of this thread, but I'll put my 2 cents in.
I have the very real belief, that if you are going to make use of it, then get the best/pay more.
I use my computer pretty much everyday, some of which is for work, but mostly to browse/use the net (casual stuff). If my next computer cost £2000, but I pretty much use it everyday, lets say 340 days of the year. And I want it to last me 5 years. i.e. 1700 days. 2000/1700 = £1.17 a day.
This may seem high to some people. But lets be honest. A computer is one of the ultimate technologies. You can use it for entertainment (music, video, games), use it to learn new things and be connected around the world (Internet), use it to make money or even work from home, use it to tell the time, use it for calculations, see the world from your home by viewing shared pictures and movies, draw, paint, edit videos, edit music etc.. etc...
A computer has pretty much replaced the need of so many things. You have infinite possibilities with a computer, you can do so much with it, even if it's just for casual non productive stuff, like music/movies/games/surfing the information highway.
So my point is, to many people this is expensive. But to me, it's a price worth paying for what you ultimately get from a computer.
And let's be honest. The "main" reason I'm getting a new macbook pro is so I can learn SWIFT and use Xcode on it. The honest reason I'm getting it, is because I'm addicted (like a lot of people are), to wanting the latest and greatest tech even though I don't need it. I mean my current laptop (as I await for my new macbook pro), I bought this year brand new from Asus for £160! And it's so zippy and quick for a 2GB ram N3050 cpu machine. The screens crap, but it runs really well, and in reality I could use this lappy for a long time to come for most of my needs; it even played games smoothly on crappy graphics (though I personally hate crappy graphics, they have to be ultra).
Another example is I could have kept my Note 4 which I was mostly happy with and would have lasted me many more years, but then I upgraded it to an Edge 7.
So my other point is. Whether you buy the new macbook because you need it or want it. Just try not to forget how awesome and how far computers have come, and enjoy them. Because they are worth the price.