Dell XPS 8900 Intel i7,16GB DDR4 Desktop

I currently have a 6 year old Dell XPS with an Intel i5 and 8GB RAM with built in graphics card, running Win 10 Pro. It has been a great computer for me, but I am afraid it is getting old and before it gives up the ghost looking to replace it with a faster and better PC that will do some XPlane and other flight simulator games on medium graphics mode. Anyone have any thoughts on this particular PC for my purposes?