I can't give you specific component models to looks at, since I myself haven't really looked at them recently (with the exception of my graphics card, my other components are 5+ years old and still run every latest title on max details), but I can point you in the general direction. You may already know most of the stuff I'm about to write, but I'm writing it anyway, as it can serve as a solid guide to anyone interested

So, here it is:
Motherboard: I've gone with Asus as a MB manufacturer for years and they haven't let me down so far. Choosing the motherboard is the crucial part and where most of your attention should go, as other components connect to it. So pay attention to:
- the processor socket, since that limits which CPUs you can choose from
- the supported RAM type (DDR3, DDR4,...) and the maximum amount of RAM you can hook up to the motherboard, as well as the max supported working frequency of RAM.
- Power supply connector. 24-pin is the usual standard, but as there are exceptions and it can limit your power supply choice, pay attention to this one.
- PCI Express slots - this is a minor consideration as all MBs will have at least one PCI Express x16 slot to which you will hook up your graphics card, but still something that shouldn't be overlooked completely. Modern graphics cards use PCI Express 3.0 slots, but they can work perfectly on PCI Express 2.0 too (I have a setup like this), with possibly a barely noticeable performance impact, since the data transfer rate is slower on PCI Express 2.0.
CPU: Go with Intel as a manufacturer. This is not to say that AMD should be avoided at all costs, but their processors tend to heat up a lot more than Intel, so if you go with an AMD, it would be a good idea to consider additional cooling options and not rely on the stock cooler fan that comes with the CPU. Also don't go below 4 cores and 3GHz when choosing a model.
RAM Memory: Kingston as a manufacturer, or alternately Transcend does a solid job too. Don't go below 8GB, but I highly recommend going with at least 16GB, as RAM helps out a lot with gaming performance and can improve it even if some of the other components are a bit older.
Power supply: Chieftec is the go-to manufacturer for power supply units. As for the PSU strength, I'm guessing you will need at least 650-700W.
Graphics card: For the actual card manufacturer, again I tend to go with Asus, but manufacturers like MSI do solid work too. Now, for the actual GPU, the choice is highly subjective. Some people prefer nVidia, others AMD (former Ati). I have tried both and have had a much more positive experience with AMD/Ati. My current graphics card is an Asus AMD Radeon RX 580 with 8GB DDR5 GPU RAM. For the GPU RAM, I would look at models with at least 4GB, but if you can afford it, go with 8.
Hard disk: classic, magnetic drives are much cheaper than SSDs and mostly won't affect your gaming experience. The best option is to combine the two - get a smaller SSD just for the operating system, drivers and essential programs and get a larger-capacity (at least 1-2TB) classic HDD for all games and other installations. For the manufacturer, if you're buying an SSD, Kingston is once again the best around. For the classic HDDs, Western Digital and Seagate are good choices.
Needless to say, don't look at the latest, just-released hardware, as those initial prices are always ridiculously high. Go with stuff that has been around for at least six moths to a year, as the prices are much more affordable and you won't really miss out on anything performance and feature-wise.
That's it. Hope this guide helps you out (and anyone else interested) and good hunting!
