I paid £650 for new Koni stainless coilovers from Venom Motorsport. They have damping adjustment. I had a pair of cheap coilovers (£120) on my mk1 caddy and they were fine for that but the Koni's are better, which isn't a surprise.
Ouch, just been on Venom Motorsport and Koni coilovers are £960 - try shopping around for them, they must have had a deal on when I bought them so they can be had for near £600.