I agree that the info on the Vossen CV1's is useful. From what I recall those wheels are like follows (disregarding the change in wheel diameter and tyre choices):
22x9 et30 = Wheel is 16,35mm further out towards fender lip, and you gain 3,75 mm between the suspension arm and wheel (compared to stock 21x8,5 ET40 wheels)
22x10.5 et38 = Wheel is 27,4mm further out towards fender lip, and 23,4mm further in towards suspension.
From what I can see from pictures of the suspension there's not much room between the front wheel and suspension arm, but most 9" wide wheels I've seen have ET35 offset or lower, and shouldn't be a problem.
In the rear there seems to be lots of room between wheel and suspension, but someone who actually have done some measurements should post in here.
(post edited: I posted my 20" options for the CV4's previously :redface