Hey Woody,
I find adjustable top is better than nothing .... my only point of disagreement with DD is that you need coilover setup to get a result. I have found the plate itself limits the adjustment and the spring does not foul (in my car). However, I have used the Noltec top and modified it to give more neg. In stardard form it isn't quite good enough for neg camber but great for instant castor adjustments. Depends on street or track use I suppose. Be prepared for the front end to rise, as the plate will raise your ride height.
Cheers