There's all that as well..
Going through VRTing mine now..it's sore on the wallet to a completely different scale than the FTO ever was... but I was laughing all the way to the NCT centre this morning - and I've a fairly long drive.
Having said all that - I've no doubt that in "real world" back road with decent surface a well driven, well adjusted and well maintained GpX would be hard to shake.
Mine still gives me what James May describes as "the fizz"