Eibach are a market leader - I've had them and they were fine, although from your link, I didn't think the different engine sizes were as compatible as suggested, they'll fit (I'm 99% sure) all except 3.2, but the difference in weight for various engines is fairly substantial.
Also depends on the wheels you are on, as the ET (offset) of my rears was too low, I had to raise the rear back up, the lower you go on the rear, the worse the inner tyre wear too.
That said, just get them, it'll look great and the tyres would have needed doing anyway!