4/4 is really, really good. I mean, you might not even include all 8 in your deck, but having your choice of a 4/3, 4/2, 3/3, 2/4 or 3/4 split is really, really, really good.
I run 3/2 and Vesuva and its been pretty sweet in some decks. One deck came together used Mana Breach, Meloku...