You will never get a clear answer. I already went through this (use the search key for the word «tires»).
Rubbing is the main issue if you decide to go to wider tires. Apparently, no two CSVTs are built the same (!!??). On one car you would experience rubbing with the 225 tires, on another you don't (??!!).
I think the honest answer to your question is: stick with the g-Force KDW 215/50ZR16. These tires have been designed for your car and they are among the best high performance tires on the market. The noise issue is very subjective. If you read the posts on this matter, you will notice that tires that seem to be quiet for some are noisy for others. It is true though that the KDW become noisier with mileage (as all the other tires do). But hey the CSVT is a sport sedan ! It is not a Camry !
In my case, after 16K on these tires, they are still very good. I would not consider anything else.
Hope that helps...
