As for the grip:
I was reading through some forums and one thread said the BCM Gunfighter Mod 1 has a thinner grip than the Mod 0, so that's something to consider. I got the Mod 1 since I have smaller hands.
The higher angle just makes handling much easier for me, I don't feel like I'm dropping my wrist so much as with the MOE (not sure about MIAD). Also, the thickness really tapers out towards the top giving you a high grip on the back and into the trigger guard.