Trying to somehow trade Rondo for Paul would be a franchise killer. As good as CP is, he's not much better then Rondo. Factor in that the C's would have to give up Rondo and probably Jeff Green will some picks. And the fact that it would cost twice as much money for Paul then Rondo so you have less to spend on the rest of your roster would destroy the winning momentum they've created the last four years.
I feel the same way about trying to trade for Howard. I believe if Orlando decides they have to trade him next year, it'll only work with the Lakers in a deal for Bynum. Howard would be great to sign after 2012 if one of the big 3 retire to free up some money. That will all depend on what Howard wants from his career tho. Does he just want max money and try to win on his own or is he willing to make a bit less and win championships. I believe the C's will be the favorite if he chooses the latter. I think he really respects Doc and Danny and the way the franchise has turned and reshaped the nba over the last 4 years.
Lets also not forget, Phil Jackson is retiring after this season and the lakers will look a lot worse next year without him and lesson players opinion of playing for them.