Lets say it this way.
Don't run it to think you are going to get anything better than you can with 87 on a relatively stock engine. But running 93 is not actually going to destroy your engine. Just waste money on these engines.
This is one of those questions where you will have the left side and right side and very few people in the middle. I personally am in the middle. I don't see a reason to run it in these cars, unless you figure out how to boost it or increase the compression ratio. But running it wouldn't be detremental and cause engine problems in 20k miles. lol.
OH and by the way I currently run 87 in ours
have since day one