If you can swing Bynum and Odom for Howard, you do it. You maybe consider Gasol and Odom for him, but you think long and hard about that first.
IMHO, the Lakers' goal should be the have Kobe, Pau, and Howard on the roster together. That would be unstoppable.
Chris Paul is really good, but Kobe plays PG at crunch time. Having both is redundant. Big men, especially ones like Pau Gasol, are hard to come by.