If all our players opt out, which is extremely unlikely, we would have about 15-20 million in cap space. The cap will probably be about 50-55 million, meaning that our salary can't go over that. I don't think that's enough to sign CP3, even if he wanted to come here.
But I would rather have CP3 than Lebron. Lebron is good, but 90 percent of his game is predicated on his athleticism. In 7-10 years, when he is not as athletic, he won't be nearly as effective as he is now.