One of the more popular places to buy Zeal online is IPSracing.com
I really have not looked around too much to find them else where, but I'm sure there are a number of places that sell them.
As far as you saying your car is not a daily driver, do you mean it's a purpose built race car, or it's your weekend street car. Because as Trey sort of eluded to, many of the coilover systems out there are not meant for the street, though I would disagree with the wear thing. We run a variaty of different coil overs on different types of cars, and the reason people are ussualy coming back with ruined coilovers has nothing to do with premature wear, it's ussualy that they don't realize that the coilovers that they just spent $2500+ bucks on, were not designed to withstand the impact of a 7 inch deep pot hole, or that they can feel their teeth and everything else in their car ratling, or their car is what they consider to be too "bouncy".
Do your home work, and see what your driving style is really like and not just how you picture it, and if you do a lot more track then street, then look into a more tunable precise coil over, if not, don't spend the money, as I don't think you'll get what you expect.
Later!
Aj