Gr8:
I really like those MX-4s as well. However....
I have to play the devils advocate here: Why wouldn't you want to shoot a broadhead that you KNOW flys better than what you have?
I almost want to break out the

and watch as the HNIEPD rolls out with the paddy wagon.
Think about this: With all the money you have invested in your equipment and all your time and effort... whats another $10 for the ONLY part that ACCTUALLY DOES THE KILLING?
Again, I'm just puttin a bug in your ear. Good luck.