Just like rifles, only accuracy matters.
The most accurate broad head you'll ever see is the Slick Trick.
Also concur that front of center weight "shoots better", as in better accuracy.
The speed difference between a 100gr and 125gr broad head is irrelevant. You lose perhaps 3fps per 10 grains. That's 8fps total.
My favorite expandable is the Hypershock Aftershock. Better penetration than the Rage with just as big of a cut.