I have adaptive chassis control on mine. Its a nice option to have and gives three suspension modes; 'Comfort' 'Normal' and 'Sport'. I tend to have mine set on comfort as i do a lot of motorway driving, but do cycle through the modes when on A and B roads.
Having said that I've driven a GTI without it and it seemed a great compromise for all situations to be honest. Not sure what ride is like on 19" wheels but on the more standard 18" and 17" I would consider it a bonus if the car has it, but not a necessary option at all.