Congratulations .. I have heard the G3's many many times , their bass is astonishing .. I would run the subs much lower down in the x/over..like 50hz
I have a friend that listens to 14 hours a day of music , normally with some good spliff .. he was a hifi newbie 2 years ago (but a serious music appreciator) , some B$W entry level , then to vivid 1.5's and he bit the bullet (he is not a wealthy man) and got G3's and a devialet .. he is now in audio heaven.
We did try a sub with his setup , but I thought the subless sound was better.. faster ..
The only speaker I have heard that betters the G3's in dyamics is the AG trios..
I have heard every model in the range , driven by various electronics .. and they are all amazing speakers within their class/price range
Once again.. congratulations and may you enjoy and have much pleasure with your new toys