To be perfectly honest i don't know too much myself, mines being done today, gone for some blistein shocks from euro car parts and some -55mm venom motorsport spings, also replacing front strut mounts and front bump stops. Not doing it muself though, a mates piking it up and doing it for £40!
A few people on here have gone for the streetline kit available from euro car parts (stuart does it for a discount in the deals and discounts thread), very good reports from all. try and serch on here and read there comments.
Chris