First, there is preference here. People can say you need a 30mm spacer but you don't have to go that far. With my camber (not to mention ride height) 30mm would poke and look bad but 5-10mm would look great.
My brother runs 30mm spacers on his m35 and hasn't had issues at all. It has been alteast a year but he knows people who have been doing it alot longer. I wouldn't do it with aftermarket rims because it would just look so much better to get lower offset wheels but he is rolling his stockers (which actually look really good).