Tearing down buildings sound neat at first. But, have you added up all the resources you will have lost? Think about all the hours and days spent building bricks and chairs and shovels. You are just going to throw that away for a marginal increase? What happens when you like the casino buildings better? Another tear down? Yikes. Plus you will artificially gain levels for building you already had. This opens up more service needs for no real reason(6 lanes!). I say leave em and build fresh ones.
