here's what made the decision for me.
What phone are you coming from? Droid 2 ? Try not using the physical keyboard for a week. How's that work for you? Would you be fine without it?
Easy answer then, Bionic.
on the other hand if you are like me and are rather inept with no physical keyboard ; Droid 3 hands down.
Simple easy question , simple easy answers.
I came from am Droid 1, my partner has a Droid 2 and coming from a droid 1 - WOW. I still prefer the Droid 2 Personally...but that's a matter of personal preference due mainly with issues to rooting and the like.
droid 3 rooted would give me no regrets at that point. But that's another point all together.