By the time you start getting good results you won't want to change back.
And perhaps, if you feel you need to drop a lot of fat, go on a carb restricted diet rather than fat restricted. And keep in mind that diet is 50% of the equation.
Again, if you want more info/help just yell...
Turbofan
P.S. I'm no absolute guru mind, I just know a fair bit simply from intense study and personal experimentation. Cheers.