I think that will work well. I bet you’ll get 35-55 fps in high settings on 4k depending on plane and terrain. A good smooth 30 is fine for MSFS. I have a slightly higher end system and am getting in that range with ultra settings. Sometimes I drop a couple of the ultra settings down a bit, but sometimes just leave as is. It is hard to tell much difference between Ultra and High anyway in most areas to tell the truth. I’ve found that as long as I have 30 or more it looks just great.