OK people asking about different makes and stuff, with suspension as with everything,you get what you pay for. Basic rule of thumb is German gear = quality, UK budget gear =ok for the price but not great.
So in order of what Id want on my car just in terms of handling and quality of the setup (with the best setups likely to have actually been tested properly by the manufacturers):
1. Anything German - Bilstein, Eibach, H&R, KW etc
2. Anything Dutch - Koni
3. Anything British and relatively pricy with a decent guarantee - Gaz, Leda, Avo
3. Anything cheap and British or cheap and who knows where its from - PI, Apex, G-Max
it depends how much you want to spend, but I dont think youre ever going to be disappointed with anything from 1,2 or 3. However if your quest is for the ultimate drop then perhaps you can put up with dodgy handling, its up to each individual to decide really. Theres a reason why the bigger and better manufacturers dont offer huge drops in their catalogues, because theres an optimum drop and beyond that point the ride will get worse and sometimes dangerous.