FWIW
We have a 21 CX5 Signature and it comes with graphite-ish 19’s and we like it. Yours looks great!
So do you know the weight difference between the 17 wheel/tire unit vs the 19’s? Is there a handling difference?
In my limited experience, one time replacing 18 inch PAX run flats with BBS forged RS units on an Acura, I saved something like 80 lbs unsprung weight and the handling difference was remarkable, even discounting the lower profile tires!
Second time is on my WRX where I replaced my 18x8.5 summer package (Enkei made OEM) with Moreno Racing 17x8 winter package, the handling difference is again remarkable saving 20+ lbs unsprung weight. The car feels much lighter on its feet, brakes and rides well. You can easily tell that the 17’s are much lighter in weight than the OEM 18 wheel/tire unit.
The winter tires are 20 mm narrower section and higher aspect ratio, and you can tell that there is much less grip at speed and corners, but that is not why I got winter tires. At reasonable speeds I want winter performance in snowy weather or very cold temps that my summers cannot give.