bmx2jayz

Okay so i have a 2002 is300 and i just lowered it a while back so now on to the next step which is wheels and right now i have my eyes on some enkei rpf1 but i dont know what size to get. I do know that i want either 17s or 18s but i dont know the offset or width so can anyone help me and tell me what offset i should get like if i want to be fitting my wheels properly. Im going to be getting tires too and i am planning to have them stretched just a little tiny bit and i want my tire to be fitting almost flush with the fender i dont want to be tucking like i am now and i dont want any poke i want a nice comfortable medium. Any advice or tips