I shall join in the Ronnie hatred. I simply hate to see Jordan and Laura on the block together, meaning we lose one 'eye candy' for sure.
I am very torn: on the one hand, Jordan is simply one of the cutest girls even to be on BB. She seems sweet, sincere, etc.
As for Laura: I think she went way overboard on her implants (Jordan has them too, but she was more reasonable). Nevertheless, I have been impressed by her intelligence and perception. She would play a more interesting game than Jordan. I think she would have a more killer instinct and go after people like Ronnie should she win HOH.
I guess that on balance I would rather Laura stay, based on her (potential) gameplay.