My coilover life-cycle would go like this. (and has, 2/3 of the way)
Stock
PIC Select
Remote reservior moton
Anything that would be beyond the abilities of PIC coilovers (top level time attack and/or sponsored track racing), one would be serious enough to buy an even more widely adjustable Moton setup.
I feel PIC is the best buy for quality, options (you choose-it spring rates), and customer service. Anywhere near the $1000 price range and beyond, I would recommend PIC. They don't break down, the springs are very well matched to the dampers, the rebound dampening adjustment is linear between the 8 levels, and the material selection and build quality is top notch.