if buyer is willing to shop around to get the rears then the pirelli pzero assymetricos are good as are the conti sport contact 3, you can get them in the front sizes for less than the GSD3's but you'd need to hunt around to find them for the rears.
if you can get the eagle F1 assymetrics 2 then they are very very good
http://www.tyrereviews.co.uk/Tyre/Goody ... tric-2.htm
http://www.tyrereviews.co.uk/Tyre/Conti ... tact-3.htm
i like the websaite, not becuase of the human reviews, but because it pulls all the magaziine reviews together for each tyre, so you can see where they tend to come.