Well, it really depends. If Ray Allen in his last two and if Perkins plays like his last 2, most likely Boston. Anything else then that, I would say The Lakers!
This will most definitely be a very close and classic NBA Finals, having two memorable franchises with much, much history. I say the Lakers win it in 6 because the Celtics have had to go 7 games against the Cavs and 7 games against the Atlanta Hawks (Yes, the Atlanta Hawks.. season average was below .500). Anyways, I have the Lakers in 6 from incredible games from Kobe, the future HOF.