Martin - you have a pm.
The dual exit i got cost me £400. I think it retails at around £600-650 mark from the place i mentioned in my mail.
As mentioned welding was top notch, and id go as far as to say it welded better than the Nismo. However, the Nismo for me is one of the best sounding exhausts available for the Z. Supposedly, unless your going FI the single piping can produce better HP results, as well as having the benefit of being lighter.
Just to mix it up abit id go single exhaust, just to be different from most people who have gone with the Nismo.
Heres mine
http://s102.photobucket.com/albums/m85/ ... V00073.flv
God i miss mine