The higher the floor the better. Requesting specific floor is more likely not a request that will be met rather than just requesting high floor, so best to put in a request now through MS for high floor. The biggest problem with theme park view is that there is a large parking lot in front of the building and the lower the floor, the more that parking lot becomes your main view. Theme park view is on 5th floor and above right over the lobby. Get 5th or 6th floor and your most likely reaction will be "I have been ripped off paying all these extra points for theme park view." Seventh floor approaches OK, and you need 8 or above to really feel you have a theme park view.