9.5x18 xxrs and a 40mm drop?

after seeing a few cars with them xxrs or rotas on i decided instead of getting my superleggeras painted white am just going to save for a set of xxrs.
just wondered what size and offset does people who have them fitted reccommend?
my suspension is standard at the mo but getting some sti shocks with eibach springs on them so should be about a 40mm ish drop.


was gonna save up and make it go fast as am bored of it already but they look so cool on some fat wheels.