i would go with ttokkyo bc its the best for your money
i doubt that the quality difference is that big between denkall and ttokkyo
but for sure not the brovel
im on the ttokkyo deca right now, not very long into it so im not gonna bs and say im loving it, but im sure i will in the next few weeks its only been in my system for 3 wks
havent heard of any fakes
just make sure there is a tk on the bottom of the bottle