will just use the Fidelio X2 with a BoomPro and some cheap Logitech 2.0 speakers (use them once in a blue moon so they are enough for me) so the GSX should be fine.
Is there any good comparison Video between SBX and the GSX 7.1 that i could look at/listen to to make up my mind which technology i prefer?
I haven't seen anything lately. And from every single video I've seen, they don't sound like the real thing to my ears.
All I can say is that both GSX and SBX are among the best. You really would be fine with either. I wouldn't choose a device simply based off one or the other, but what the devices do aside from that. The GSX1000 is in reality vastly limited and I wouldn't normally recommend it for people like me who need things for consoles or external devices like dac/amps, unless you're fine with double amping from the headphone jack. Some of us are fine doing that, most audiophiles aren't.
But the GSX1000 sounds so good to me, that I make an exception for it. This is my recommendation. Fotopaul has his tastes and that's fine. You can't go wrong either way, and the G6 IS more versatile. I just think it's less appealing if you're using it as the only device. The GSX1000 has a better dac, I feel. The amp is better on the G6 and has more volume headroom. Though for stuff like the X2, the GSX1000 is fine. In raw form, the GSX1000 sounds better, virtual surround differences aside. If you're like me who uses virtual surround mainly for gaming and stereo for the rest, GSX1000 is my vote. If you always use virtual surround, maybe the SBX is better if you want the least reverb, but then again (from my limited testing) I believe the tonal balance sounds dry and sharp in comparison to the GSX1000s more organic, fleshy, natural tonal balance, which I think is suitable for the X2.
In short:
One device for your needs: GSX1000
One device you may wanna pair up with other stuff: Creative G6
One device that has a good internal dac/strongest gaming amp and plan on no upgrades in the future but costs more: Creative X7