Yeah I was thinking the same, there are loads of people who have upgraded their ICE on their IS200s, but a lot less I think, especially active members, on the GS. Don't know if that's because the GS has a better system or perhaps it's more reliable (the IS200 OEM head unit is notoriously unrealiable so a lot of us get forced to replace it !). Or maybe it's because GS owners don't often look in this particular subforum too often ?
Anyway, hope this hasn't put you off the club, you're very welcome, and I'm sure the ICE experts around here would love to hear more about what you've done to your GS's sound system ! :D