I'm thinking about which combination would be best

I have 34" WQHD + 27" FHD + 27"FHD triple monitor configuration.

I will be purchasing a graphics card.

4090 + Dell S3422DWG (VA)

4080 + G8 OLED

I’m thinking about which combination would be best.

I would love to hear your advice.

CPU - 7800X3D.

Games are only MSFS.

Both options are curved monitors.
Are the three you have now also curved?

If it were my money, I’d prioritize my spending on the GPU, and go with the 4090 / Dell Monitor.
Make sure you have a robust power supply. I’d recommend 1300W from a good manufacturer.

Amazon Prime deals today and tomorrow have this on sale. Great P/S.

https://www.amazon.com/dp/B09JL3TWTF/ref=s9_acsd_al_bw_c2_x_5_t?pf_rd_m=ATVPDKIKX0DER&pf_rd_s=merchandised-search-6&pf_rd_r=TRNN0Z9N1XTYA2WY0MKM&pf_rd_t=101&pf_rd_p=f20c4cca-8506-4283-b5e7-37e1cc463618&pf_rd_i=119854155011&th=1

A 27" monitor is flat.
34" Only the main monitor is curved.

I want the 4090 + G8 too, but I have to make a choice.

4090 + Dell S3422DWG or 4080 + G8 OLED.

Thanks.