Re: sick of my exhaust.
The best advice i can give is the same I used to give to Saxo owners is:
Go in talk to the fitters, maybe even to the point of asking to have the car put on the ramp and have the system looked at.
Make sure your happy with what you both are agreeing on then make a appointment.
I think the more interested and keen you come across as the better, but thats just me