whoa, that's expensive for US I think. But good upgrade, probably realistically the first you should make since you're holding on to the thing all the time!
'98 Avus Blue 320i - SOLD '06
'06 TiAg 320d - SOLD '10
'07 Montego Blue 325i - SOLD '12
'07 Z4 Coupe 3.0si - SOLD '16