I see. Good advice Smooth. It's is a holistic consideration and package.
I have 225/45 R17 Bridgestone potenzas RFT.
Planning on doing eibach pro-kit and decent shocks as well.
Then move to 18" non-rtf in 235/40/R18 in Michelin PS3.
That should fix the handling and turn in.
Just 18" wheels with non-rft and the M3 arms and maybe a larger rear sway bar....keep the stock height but beef up the feel and cut the roll.