i know its a popular topic so thought I'd bump my original thread with an update having finally made the move to 18" wheels and fsd/m033... my original quest was for first hand experience so it's only right I share.
so I was making the move from old Monroes and m029 springs with 65k on them, running 17 inch cup2 with ps2 Michelin 205/255, shocks in ok condition but worn and slight leak on front drivers, already done rear engine mounts, geometry checked and to spec. std roll bars. std tyre pressure.
my intended use is to suit a weekend fun car without comprising the ride for Europe trips but reducing the excess roll and turn in understeer which was just spoiling my track day fun a little...
https://youtu.be/V6g8vWyo8ec ... not expecting the impossible, just a good compromise.
so first change was oz 18 alegerrita with pilot sport Cup 2 225/265 std pressures but no other change to suspension. with this set up and old suspension, the grip and turn in was what I wanted, but the ride was a bit harsh and very unstable over bumps. tyre noise was also worse.
I tackled the tyre noise first by following the other threads on here and insulating rear and doors with skinz products...a little extra weight, but a huge difference to annoying noise reduction.
next i did the fsd/m033 and all new mounts, drop links, arb bushes. i checked out all the other bushes and couldn't see any excess movement or issues so for now, I've left them alone. set camber myself using a magnetic tool and rechecked over a couple of weeks as the suspension bedded in.
result...magic... just what I wanted... once settled, the ride is great, no harshness and more comfort on fsd/m033/18 than with old Monroes/m029/17, initial woolyness on turn in has gone, no understeer and high speed stability is great. can't wait to try out on a track day, although its obvious they are not a track focused shock/spring. height of car also looks right to me (i will post a follow on pic).
so if your needs are anything like mine... I'd certainly recommend the combination.
https://photos.app.goo.gl/tMbyBBottW5VPATRA