You are right guys..
I am about to order 18x9.5+31 fronts (3" lip)
and for the rear side 18x10.5+35 (4" lip)
the rears won't be with a 225tyre tho.. probably 245-40-18
check this out :
This is 18x8+20 225-40-18
Which make my 18x9.5+31 poke about 8mm (without any camber, but I'll be using camber plates)
This is 18x8.5+15 255-40-18
Which make my 18x10.5+35 poke about 6mm (without any camber, but I'll be setting camber)
So thats where we stand right now!