I'm still with the G6, I found it quite better compared to the trial versions of Dolby Atmos for Headphones, windows sonic, Razer THX, and the dolby headphones implemented in the old Logitech G35 headphones. I also really disliked the GC7's SXFI, it had a lot of reverberations while the SBX surround is relatively clean. I did have a GC7 and quickly returned it to buy a cheaper smaller and supposedly better engineered G6 as I only liked SBX anyway. The G6 is nicer on the table as well with smaller size and better volume knob and small simple SBX on/off button (I prefer to disable SBX for stereo content). I set my surround parameter to 33, I found that gives me the best separation between front and rear sounds, which are apparently the most difficult to simulate (they were almost indistinguishable with Atmos and Razer THX, even when setting the Razer THX to be as much "rear" as possible).