Leda are very good but it depends on your budget, for road use they are a bit OTT, but if you intend to track day the car, then they are pretty good.
KW are very good, they use stainless steel bodies, and have a very good pedigree in Germany and most of mainland Europe.
I have Avo coilovers, and though they are one of the cheapest, they are still very good, and I have track day'ed my car several times.
It all depends on the budget you have, and what you are looking at doing with the car. You can PM or e-mail me for more info if you like.
Steve