I've been using Dunlop Tortex sharp pickups for almost ten years and they suit my purposes and playing style perfectly.
They're great for heavy blues, rock and metal riffs but are still nimble and precise enough for thrash. The sharp edge is wonderful for pinch harmonics (Zakk Wilde-esque squealies)
I tend to use the 1.14mm version of the pick (the purple one) as it's just 'right' for me. In particular, I find the sharp edge is wonderful for pinch harmonics (the squealies :-)
I do use these heavier 1.35mm picks for bass and I'm planning on buying a 7-string in the future and I'm sure they'll come in handy for the heavier string gauges.