Basically, i am looking at a 19" Breyton GT / GTR at hupshoon. but alternatively im giving Exoticmod a chance as consideration to AEZ or DOTZ rims 19". As it is my first BMW 3 series. I need all guru's and sifu's advise on a 18" / 19". Worried of major power loss as im not considering of re-mapping the ecu / sprint booster for time being.