Tenzo's are crappy as well. I recommend you stay away from those. I haven't heard many good things about the ride quality of the Skunk2 coilovers, either.

I recommend you go with Teins. They are a little more expensive, but the ride quality is very pleasant and the build quality is superb. You will need a new set of shocks because the coilovers will rape the stock ones and blow them out rather quickly.