I've always had favour to the Madbull Blue, but they can be tricky to fit. recently been enjoying the (cheaper) guarder clear, but they are quite easy to tear (for a rubber, they don't just fall apart). Some people like some stuff that others wouldn't touch with a barge pole.
Try a Guarder Clear first as they are a good rubber for most stuff and if you don't like it, it's not much money really.