The Mondeo/ST170 setup is cheaper, but it does rule out most 15 inch wheels.

As I have said in the sticky in the top of the forum, the Cosworth setup is a very good choice if you can get the parts for a reasonable price. IMHO I wouldn't mill the disks, just fit the 1mm washer as per the sticky to centre the disk in the calliper. I just realised the pics are very old and grainy in that thread, I should take some new ones!!

Lee