Lower front end = lower centre of gravity & more traction, through being able to put more weight on the front wheel when needed.
Might notice a change on the really steep stuff at first, but you'll just adapt after a few runs.
Pros outweigh cons by far, I say chop away.
Minor consideration: Chopping your steerer to less than about 190mm may affect fork resale chances. A bit.
Oh and post this sort of thing in Parts n Stuff next time