My option is not up there:
Revised Standard Version: Catholic Edition. Not because I am a version-nazi, but because this one is a little less than an inch thick, about 6 inches long, and 4 inches wide. In other words, it fits in my book bag! They had us using the NAB in my intro to theology class, and that this was HUGE and, with the right ammount of force behind it, could probably kill a man.
I also like to read out of this really old copy of the New Testament put out by the Confraternity of Christian Doctrine in 1941. It is a revision of the Douay-Rheims, smells like dust, and is bandaged with black duct tape. I love it.