Hey man,
Apex seem to be popular, they give about 40 at the front and 25 drop at the back if I remember, also the car is about 20% harder and the handling is improved also a wee bit.
www.camskill.co.uk sell them plus a few others. Someone did mention that Apex had gone out of business so you may get a set fairly cheap. I've had them on mine for about 3 years and never any trouble. If you are doing them yourself you will need a set of spring clamps to compress them to get them in. After driving around for a week or so get your wheels laser aligned. One of the best and cheapest mods you can do.