Thanks for everyone's contributions (and rants).
I really would like ABS and I'm not worried about the electronic side of things - I can handle that. What I don't know is whether its possible to hang ABS sensors on the suspension as fitted to this era of Aero...(I think the S4 had different front suspension arrangement)
In view of the number of Aero Plus 8's that have been written off, it might not be a bad idea to try.
Cheers all.