Everyone has their companies they stay away from, and tend to stick with ones that they have had zero problems with.
Well, I've bought so much hardware over the years that I seem to have had problems will all of them by now.
So at some point I had to get some companies out of the 'stay away' list, and give them a second try, or even a third.
On the other hand, many of the companies I've had problems with no longer exist anyway, or at least are no longer in this line of business.
Which also means that for a lot of components there's only a few brands left.
CPUs: only Intel and AMD, and it would seem that they have pushed all third-party brands out of the chipset market as well (yes, people were all over Intel for booting nVidia out, but I haven't seen anything but AMD chipsets for AMD CPUs either, lately... No SiS, no VIA, no nVidia...).
GPUs: only nVidia and AMD.
Harddisks? Don't think there's a lot left there either. Just a handful of brands.
But especially with CPUs and GPUs you'll find yourself ping-ponging back and forth... You can only move away from a brand once, before you have to go back to a brand you already had problems with before.