Lie and sod's law says you'll get caught when you have an accident and you won't be able to claim. For the matter of a few quid, why lie?
My personal opinion, lie and I hope you get caught.
Having driven both standard (my brother had a e46 m3 convertible in carbon black with the smg gearbox when I had my zed), I'd say the zed was a thousand times nicer but then I might be a bit biased. Alright dude long time no see.
Having used tein springs at high speed, I'd say save up and go for coil overs if performance is your thing. At high speed mine didn't feel planted. Too much play.