I love my Esky lights which are they same as the G5. Yeah I blacked mine out but I have to say I love love love the way the Esky lights light up. The one single running lights make it looks soo good. I just wish they would have done the same lighting that the CTS have, but anyway back on topic. I would go with the G5 IMO. I also ran my Esky lights with out the esky upper appliq for almost a year and really didn't bother me but once you do get the esky upper appliq it makes a big difference.
I will give you both examples of both lights on my car since I have had both.
G4
Esky light up and also with out upper esky appliq
With Esky upper appliq