Hey Boxhead,
Sounds like you got your self a bargain there, way to go.
Been checking some of the Jag sites for info on the front ends and from what i can gather its to do with solid vs vented rotors and 2,3 and 4 spot calipers(please correct me if wrong).
Going to look at a series3 daimler sovereign today, hopefully it'll be ok.
Cheers Robo