If your really set on this type kit over paying for coilovers go with the ground control kit as quality of parts is far better. Just be aware in some countries these will not pass nct/mot inspection. My advice save your money for some coilovers you will be much happier with them
As said if your going for that option stick with Ground Control and pair them with a good shock like Koni, i have this setup myself but use skunk2 sleeves and run custom spring rates.
the cost of a decent coilover sleeve/koni shocks is almost as costly as coilovers, the only advantage is if you are after looks rather than performance, as they are generally known to go alot lower than a traditional set of coilovers