I have a good experience on this PC and at ten years old and although it has been upgraded, I, no doubt like you, can see the need for a new machine on the horizon. At present, it copes really surprisingly well but as the sim is developed it is going to increasingly feel its age. Current highlights are:
16gb DDR whatever.
GTX1660 super at 1440p into a 27 inch 1440 monitor
Corsair 750 PSU.
Question is, what best to look at at present and when to look for it. GPUs are a disaster right now and although an Intel man, I am not averse to AMD. The new PC would have to have a similar life expectancy and so speccing ahead isnt too much of a no no. I need a solid, fast, balanced and reliable performer with hopefully enough elbow room for a mid life update as and when. There isnt much point in getting something that simply struggles a bit less that this one will by the end of the summer.
Any thoughts, observation or tips gratefully received and I thank you now, for your thoughts and time .