Is it advisable to wait until all the problems have been discovered, and ironed out? If so, how long would you wait after release to get one? I know some people aim for the first revision of a new design.
Just off the top of my head....
I can think of 3 big products Apple released in the last 3 months that have had problems initially: Mac Pro, Time Capsule, and MacBook Air.
So, a logical deduction can be made that it is best to wait a bit before you buy. That is, of course, if you aren't in a rush to buy.