are side repeaters actually a legal requirement in the uk? cos ive seen some sweet polish cinqs with smoothed wings but i dont wana go there if its going to cause hassle.
If you go lower than 40mm the car will become impractical. If you remove the bump stops you will destroy the shocks (and it'll still sit at the same static height).
Fitting coil overs will suit a track car -- if done properly -- it makes no sense on a road car.
Not sure who does them, but you can get polyurethane (or somesuch) foam bumpstops which are much more progressive than the standard ones (can be shaped, too, to alter the progression).