Cavs will win it all. They're rolling. Both offensively and defensively. LBJ is on a mission and this series, unfortunately for the Warriors, LBJ will bounce back and have a shooting % of around 50% like he's accustomed to.
They split in the regular season, LBJ didn't play in the game they lost and they were still competitive, had it pretty close in the 4th until the very end where the Warriors pulled away due to foul shots etc etc, but one thing worth noting in that game -- JR dropped 27 in the loss and the way he's rolling right now could be a good sign... and the other game LBJ dropped 42-11 on them in a win.
I think the Cavs win in 5. Getting a W in game 1 is key though.