Check out Acurazine for the ILX section. A lot more of us over there.
And I assume you mean you'll be going with LOWER offset wheels. All wheels have an offset so you should specify what kind of offset.
Id look at going at least and inch wider and an inch or two max larger. Offset is only a small part of it.
Also interested in the turbo. What turbo and what supporting mods are we thinking?
P.S. Chances are I wont be on here for another few months but Im on azine daily. You should check out those forums. Couple good looking ILXs and plenty of knowledgeable users.