Give A to Z car parts a call, they are around the Leeds/Halifax area if I remember right, they are Meyle dealers and will be able to determine which kit is correct for your car.
Agree with jakm15's advice. Meyle HD comes with 4 years warranty. Lemforder is also OE kit. I used to use Murray's - but it's been a while since I've used them, plus I think their site was down recently. Very knowledgeable (if you've only ever dealt with Euro Carparts like something from the Wild West) - have your chassis number ready when you call them. http://www.murraysdirect.co.uk/
One point to note - if you tackle the upper arms, be aware the pinch bolt is now infamous as being an absolute pig pig to shift. You'll need a new pinch-bolt as a matter of course. Having tackled it a couple of times I'd spray PlusGas on it a few days before tackling, remove nut, then cut the head on the bolt, then add washers to wind it out. No point hitting it with a hammer. You can use heat and PlusGas to help. Only torque the upper arms once the car is on the ground or you'll stress the upper arm bushes.