Sennheiser is one of the most respected names in consumer audio and they've spent the last three years delivering new entries in their line of GSP gaming headsets. They've been well received so far. In fact, we've reviewed three of them ourselves. This summer, the company released their new flagship and first-ever wireless gaming headset with the GSP 670. It?s wholly premium, coming in at $349.95, but does it do enough to stand out from the competition and justify it?s more expensive price point? Join us as we find out.