Look on my.is .com for some decent pictures with wheel specs.
I'm running 9.5 et 40 and 8.5et 42 bim zeits on my altezza.
I had 9.5et 30 all round on my last one and the fronts poked out a bit too much.
You can't go lower than et35 on the front with 9.5" wide because the suspension arm touches the inner face of the rim.