HF2s were awesome when i used the with Battlefield 2. RS1s were pretty good also. To each is own.
But I like my AKG 240's for metal? I don't care about bass I listen more to Death Metal and Technical metal so it fits more with Classical music than Metallica metal. I also use my headphones for gaming, and Grado's aren't great for that either. I'm probably going to get Beyerdynamics since I've heard they are a mixture of Grado and AKG.