Yes I takes more than a day. It always has. Unless you use one of the build a PC guides that, these days, only get updated about every six months. They pretty much tell you what to buy for the money but go obsolete pretty quick. Even so, guides usually have a comments section that often list better builds for the money or cheaper builds with better performance.
Today there's a model number for each pricepoint from 100 to 1000 bucks for CPUs and Video cards. Manufacturers use the numbers to obscure the value of the component so a 760 might mean faster slower or the same as 660 of the previous generation. You have to research it.
It's certainly more complicated than it was 13 years ago when Athlons and P3 were sold by their frequency and were almost identical in performance. Though even then it was easy to buy the wrong component.
Forums are still probably the best place to quickly catch up on the art of building a capable sub$1000 box.