If the Heat get Bibby, they basically have Eddie House 2.0, and I'm not sure if Bibby can keep with Eddie on the defensive end.
If the Heat get Murphy, they'll get a taller, stronger Mike Miller but not that good at shooting the 3. He can rebound better if in shape, but we don't know.
If the Heat get Murphy and Bibby, they'll need 5 basketballs.
While Bibby could help Boston, I think Wafer can do quite well as a guard off the bench to get the starters rest and score some points.
About Murphy, he could also help, but Krstic and KG can stretch the floor (no need a 3-point shooter for that) and what they would miss the most in case the O'Neal are in foul trouble or suspended (they'll be ready to play in the playoffs) will be post defense. I guess Gadzuric can give that as well as Murphy, if not better.
http://www.youtube.com/watch?v=Z0GFRcFm-aYby tuesday we'll know more