I think thats about on the money really. Or you could just wait until somone decides to sell their old one and buy one 2nd hand on here.
 
Depends how desperate you are for it, if you wait a few weeks one might come up for sale on here, to be honest for an extra 200quid you might aswell get a turbo back, includes the sports cat and larger free flowing downpipe as the standard one is cack!! I payed 525 fitted for mine from Blueflame direct
 
well i would get the turbo back but i have just spent all my pennys buying my cupra so that will just have to wait. I could do with one soonish as my backbox snaped of,but i have welded it back up for now! When my back box snaped of the car had never rans so well!