I would choose a Leon Cupra rather than either the Cupra
K1 or the Nurburgring.
Having driven VXR's, they really don't excite, the VXR handling is not as good as the Cupra, the VXR brakes are weaker than Cupra brakes, standard vs standard and tuned vs tuned, the Cupra is faster than the VXR. On top, the Cupra engine is stronger than the VXR engine and the Cupra is much less common than the VXR and has the benefit of not being "obsolete".
Sure, a VXR with a Remus sounds great, but a Cupra with a Milltek sounds great too.
VXR with Remus -
http://www.youtube.com/watch?v=C1sJBCxq9To&feature=related
Cupra with Milltek -
http://www.youtube.com/watch?v=aGbiPeQ6k7k&playnext=1&list=PL1B19A4C6B4441880
The interior on the facelift Cupra addresses some of the issues on the pre facelift Cupra which in my opinion is better than the VXR, and the Cupra has more space and better seats.
And the reason I would take the Cupra over the Cupra
K1 other than the fact I don't like the Aero bumpers on the Cupra
K1 is that the Cupra is priced more keenly.
Vauxhall and SEAT customer support and
dealers are equally dubious, so that one is equal.
In short, the Cupra.