I went round the Nurgburgring last year in Goodyear Eagle GSD3's, and they performed pretty well! Definately not a bad tyre, and stunning in the wet!
Only slight critisism is that in really good conditions (ie dry and warm) I found them to be not as good as Yoki's (my personal favourite).
I am now trialling Yoko Parada Spec 2's. So far, stunning in the dry, and not so stunning in the wet!
Do be honest though, if it rained at the Ring, I'm not sure Id trust the Yokos as much as I would the Goodyears!
Also, try
www.blackcircles.com - they are not bad at all. Take them to friendly local garage, who will usually fit them for you for some cash.
JJ