QMF pads seem to be a reasonable spec at a reasonable price..
i brought a front set of ferrodo zero pads ages ago and they actually stood up for quite a few hard laps on the track, they where still fairly new back then htye are under half worn now and they are starting to get a bit ordinary, they get too hot to quickly now. they didnt have much bite either, you had to get onto the pedal to get them braking.
also there was a "big brake discussion" covering pads rotors fluid multi piston callipers etc, its well worth a read. seeing as you just went to the troble/expense of buying a coilover setup it would warrant some descent pads yeah? I'm fairly sure AE71 panel vans had adm sprinter brakes?