Any reason why you are going for coilovers ? Why not go for what most think is a good setup of Koni shocks and Eibach springs ? Be about the budget you are talking about.
I just had mine lowered with the Streetline kit from Euro Car Parts, only cost me ?135 for Ventura springs and Bilstein gas shocks plus about ?80 labour, depends what you are wanting to put the shocks on for, is it for the ride, the comfort, sportiness or just the drop.
Although for mine I can't say if the wheels rub yet as I've not had people in the back but it should be ok.