Cavs for sure.
Cavs are locked up in massive contracts for years to come, so every year they get knocked out of the playoffs (and Lebron gets another year older) it will make them burn that little bit more.
I'm really not the biggest fan of the player monopoly that exists on every single recent Lebron team, so I absolutely love to see them lose.
By 'Player Monopoly' I'm referring to the fact that every recent Lebron team has basically been built on the concept of:
1) Throw all of your available cap space onto three big stars
2) Convince every available veteran free agent to sign with you for well below market value, just for the chance to play on Lebron's team
Though they aren't doing anything against the rules, i still can't help but feel they are using legal tricks to circumvent the salary cap, which I just don't believe is right.
I am made all the more bitter by the fact that this entire Cleveland 'big 3' wouldn't even exist if not for a highly convenient bit of 'freak luck' that saw the Cavs somehow beat all the odds to steal the #1 pick in a year where the draft happened to be incredibly hyped, and in a year where Lebron James happened to be a free agent (and happened to be interested in going back to Cleveland).
I'm not one to get caught up in conspiracy theories, but that whole situation stinks of a rat, and for that reason there is nothing (NBA related) that I want more than to see the Cavs fail miserably. I don't care who beats them, I just want them to lose.
If we, of all teams, (with a star-less roster that owes all of it's success to unselfishness and teamwork) beat themthen it would be all the more sweet. Though I don't see that happening unless they get hit by major injuries to critical team members.