For mentioned games i would buy some cool thin gaming laptop - so you can play on couch or wc or anywhere you want :) (980m for compatibility cases)

But one never know if you just trolling but anyway for anybody interested, this is what anybody need next few years.

If you want future proof PC that you should target minimum at new console specs +10% power - so 8core CPU like 2700x or newer one and for GPU go for 2070/3070 (if you want that RTX gimmick) or just buy GTX1080 and invest in better futureproof (HDR true 10bit 120hz+) screen. That combination will last very long and run anything you throw at it

The purchase of a new pc is always something to be delighted about right, though asking for opinions might just be a tad worse then entering a career of politics in its self.

Where most do pretty well with low cost pc's that harbor a massive video card others try to aim at quality for lower performing parts. In the end there is not a lot you can do wrong if you aim at gaming older games. and with gpu's easily replaced not to mention how the current next generation releases are planned in. The only thing that can be said is that if you are a regular gamer you might as well spend a tad more for a machine you will be sitting beyond for prolonged periods of time, be it wkends only evenings or if you have the possibility, all day, every day for whatever reason possible. That said, if your serious about the older games you want to play and can't even conceive trying out newer games High tiered equipment does seem a bit ridiculous. Almost like buying a Hummer to do your monthly groceries, in the village a few miles away

It depends on the games. The games in your first paragraph probably do not need a High End computer. I've run into several problems with High End computers (especially with my Nvidia cards such as a 2060, I suspect it is more of a driver issue than the cards themselves though, but games like Dungeon Siege, some of the Lucasarts games and others do not run on top of the line Nvidia cards for me without a LOT of wrangling...while they seem to run decently on much lower end systems...which is crazy and wierd).

If you want to run older games, I'd say you do not need to shoot for the moon.

On the otherhand, if you are aiming to get some newer games, then you probably should go for High End in regards to your PC gaming...just be aware that with the wrong card combinatin (and I think most of it is drivers, though some of it could be that the card maker drops support of some of the older legacy systems that older games may rely on, which is why they don't run easily) you may have difficulties with a few of the older Games on GOG that have not taken these into account.


PS: I've had better luck with the Radeons than the Nvidia's. I have not had any problems getting games to run on Radeon's thus far, unfortunately normally I tend to get the High End Nvidia cards though when I'm trying to get my uber laptops and such, while delegating the Radeon's more to travel laptops and Linux.