E90 Sedan Vossen Wheels

Im looking for a new set of wheels for my 328xi sedan. Kind of new to this so I need some advice. I have a stock suspension and I don't plan on changing that as of yet, however I am looking into buying, 19inch Vossen Cvt's or CV3's. Any recomendations on offset? or whether I should get staggered or not? Also, besides the wheels, what other costs should I account for if I want a new setup.



Thankksss in advance