Graham,
Sorry for the slow response. I have been in France enjoying the lovely sunshine .
I bought the car that I mentioned above on the 14th of August (after they droped the price !) .
As for the exhaust, if it was an X-power exhaust I would have bought it.
But as I am selling my Mustang that has Ford Racing equal length hedders, a Flowtech X-pipe, and a Flowmaster American Thunder exhaust with all 4 of the cats removed. I think I would prefer the louder X-Powers.
However I have seen a pair of Zeros, and the quality of them seems very good, so I think you will sell them quickly.
Good luck,
Justin