5070 ti 9800x3d

I want to combine 5070 ti with 9800x3d but I am not sure if the cpu is really necessary for this build since the 7800x3d gives about the same performance. I consider buying 5080 but I think it’s not worth the price…

Which one of these combination is the best?

5070 ti + 7800x3d 5070 ti + 9800x3d 5080 + 7800x3d 5080 + 9800x3d

I am open to any recommendations…