Bob, I wonder what springs you are using with the Tokico shocks? Most of the complaints that I have seen come from the springs used rather than the shocks so much themselves. The Tokico's need to be used in one of two ways. First as a factory replacement where you really don't expect a dramatic change, or they need to be used with a linear rate spring. The do NOT work well with a progressive rate spring.
Claims that they do not last are absurd though. Tokico makes the factory shocks for Ford and they will assure you that they use better components in the aftermarket items than they use in the OE ones. I am pleased with the ride of my Tokico's that have about 50K miles on them.
I have both. I have owned Koni's for about 8 years and 100K miles and they certainly have mellowed over the years. I do enjoy them however, and do recommend them to anyone who doesn't mind losing cockpit adjustment. I have found that the Koni's are as smooth as the Tokico's in "soft" over bumps and more controlling at high speed than the Tokico's even in "firm" with no change in adjustment needed. They really can be the best of both worlds if adjusted properly. My Konis are mated to variable rate springs and they seem to really like it.