Seems like stock specs are:

Front:
17" x 7.0", +55 offset, 215 tire
Rear:
17" x 8.5", +65 offset, 245 tire

I'm looking for a good fitment on spacers to run a good fitment when the car is lowered dramatically, I'm on coilovers now and do plan on lowering it significantly, all fenders are rolled already.

I'm thinking of +15mm in front and rear, would that be too much for the front? I hear there are problems with the studs and such for clearance for the front spacers. Would +20 in the rear be okay? Or would that be too much stress on suspension and increase chance of rubbing? I do plan on getting an alignment afterwards, dunno what spec's yet, but do plan on some amount of camber.

I'm looking into Ichiba rear spacers and H&R fronts, any other suggestions?

 

you need to check out s4plays thread in the "gallery" on spacers.
all the info you will need.
I think the thead is called "the quest for flushness"

 

I'm running AP2 V2's with 25mm rear spacers and 20mm front spacers. I'm dropped about 2".