Thank you for the answer and the friendly welcome. Im intrested in the Gsx 1000, because im a gamer, and everyone love the 7.1 surround sounding, even the serious critics like Z reviews, and in theory greatly improve the imersion and the performance. I choosed the HD 660 S becaus there only good reviews on the internet. Im not a real audiphile, and i never had serious sound equipment, but when im listening music or playing game i want to get the best experience i can get for resonable price. I haven't bought anything yet. What you sugest for the DAC/AMP or headphones instead???