Ok... maybe not a dilemma but I do have a question for you much smarter ones. 

I don't think a 5090 is in the future for me cost and availability wise.  But I am thinking of 2 GPU's and would appreciate your input.

Asus 4070 Super TI or,... RTX 5070 TI ??  An why?

Thank you in advance

No SLI support on the 40 or 50 Series GPUs.

I believe it was an either/or question, Ray.

To the OP...to be honest I have not done much research on GPUs lately but it seems to me that a newer version of the RTX series would serve you better. However, this isn't the best of times to spend on a higher end GPU. I think they're way overpriced.
Would the card be used for anything other (game) in addition to flight simulation? Have you considered the AMD alternatives since they too offer 16GB?

7 hours ago, G-RFRY said:

No SLI support on the 40 or 50 Series GPUs.

Yeah sli was never really a common thing...