I highly suggest you go for an 18 x 7.5 max to avoid scrubbing, and to be honest, you will need a minimum of a +42mm offset. Optimal is +45mm and higher, but those are kind of hard to find these days (most are in low 40's) unless custom made. Go for 225/40 rubber as well.
H & R and Koni's will be the route you may want to go.
For camber kits, it is the Ingall's 3555 or 3557