What's better? (FA:S, TFA, CW 2.0 or M9K?)

I've used all of the packs over the years, and let me tell you right off the bat that M9K is shit. CW 2.0 and FA:S are both nice and pretty similar to each other, which is to be expected since both were made by the same guy. Recently, I've started using TFA though and would ultimately recommend that over any other weapon pack not only because it's a good base, but because many of the TFA weapons you can download are of very good quality.