I would check out the Berning MicroZOTL and the EarMax (maybe the Wheatfield too...I haven't heard as much about that one).
You really need to listen to the Grado's and Sennheiser HD600 and make your own decision. They're both great headphones and both very different.That needs to be your decision, based on your own prefernce.
You really need to listen to the Grado's and Sennheiser HD600 and make your own decision. They're both great headphones and both very different.That needs to be your decision, based on your own prefernce.