I have the same spec car as you, OEM Msport wheels I ran 15mm in the rear ( I am lowered on ACS springs)
Brand not too important, make sure they are specific to our hub size, hub centric and get extended bolts. also no cast spacers
I didn't run mine long because I bought rims but ..
pros: Looks WAY better
Cons: none that I found, no vibration or other issues
IMO, I only needed them in the rear, front didn't bother me much and I ASSUMED if issues, they would be more noticeable on the front. again IMO
hope that helps
for pics, I posted some too