i prefer fasttech over any site, yeah shipping is slower since its coming from china, but the payoff is better.
items for cheaper than what you find on ebay(them sellers order bulk from FT or FC and resell on ebay with a slight markup)
and whatever specs or info they list per item - is what the manufacture has given them. so if it is a clone, they will SAY it is a clone. you can buy with confidence you know what your getting.
one thing i can say is, they dont have tons of "authentic" items, but they do have them.