drag 3 makes a good kit, greddy is OK, it's good if you need to pass smog, but you will make more power out of the box with a drag or rev hard kit. fmax is probably last on my priority list of turbo kits

Drag
Rev Hard
Greddy
F-Max

i am going with a custom kit built with pieces from different kits. it will end up being a little bit cheaper, and i will get the exact parts that i want.