exhaust system, supersprint race or omp inox group n?

[Saxperiance]

looking at both of these systems as i should be getting a VTS at the weekend,

what sounds nicer?? does anyone have the group n one? iv sen a few supersprints around and they sound absolutely awesome however checked a vid on youtube and the group n looks and sounds awesome aswell,

only prob is ideally i want to keep the cat on the car as i dont want to run the risk of getting caught without one as its going to be a lisence loss, (illegal part on the car then voided insurance because of the illegal part = 6 points) so i was looking at the group n and the centre pipe comes in a few different parts so im sure you can fit a cat to it somehow? also the centre pipe from the supersprint is decatted... so would have to have a different centre pipe and just buy the backbox ahh.. any help would be greatly appreciated! rep waiting for any usefull answers/ videos e.c.t so far found this,


supersprint:
http://www.youtube.com/watch?v=nWdTsvG3pYk

Group N:
http://www.youtube.com/watch?v=qRH7Z...eature=related
http://www.youtube.com/watch?v=IA-1A...eature=related