coilovers questions

[WYOSVX]

Looking at GC coilovers w/Koni inserts and someone recommended I look at the custom made ones on e bay. I sent a message to the seller (Australia ebay, guy in France? he said theirs are better/last longer. I know nothing about coilovers and struts. He suggested I go with the mono tube dampers and 1 way adjustment, camber plates front/rear. It's direct bolt in, no fabbing. He also said 2 ways adjustable damping and dual springs are nice but more expensive.

It's all Greek to me. Anyone have any time to educate me? Suggestion?