Pretty hard work on 3 doors.
I have et+22 8 inch wide wheels with a 235 tyre (240 tread width) and the fronts clear the coilover cup by about 7mm. I am thinking of machining 2-3mm off the wheels as to make it 4-5mm clearance. This front of the quarter panel has been spaced out (by drilling the spot welds that attach them to where the bumper mounts to the chassis) - this is a very good mod and should be done to all 3 doors as it creates a lot of clearance. Thus for me a +25 offset for a 8in wheel would be perfect (but very close to coilover on spring cup).
The rears have heaps of clearance on the inside and could fit more width easily - I would think that a 9" with a offset of +35 would be perfect.
You will need a lot of trimming and what may work on one car may not on another.
I have been meaning to do a photo guide on my car for fitting wide wheels - will do as have not seen much info on here. I will take some photo's.