Wow. Looks like I've been lucking out the past couple days: I sit here and think, "I wonder about this or that," and then I come to the boards and there someone is asking the same question. Anyway, it looks like I might end up being in the same boat as you guys so thanks for asking this because I'm really clueless about these views too (although my fiancee would be perfectly happy with the cheepest of all the options... ).
We have been in the center on one of the high floors each time we have stayed at the Dolphin. It is simply a great location. The floors are short so you are close to an elevator and you are steps away from the restaurants, gift shop, lobby, etc. This is where we are hoping to be when we are there in November. Keeping my fingers crossed and hoping for some pixie dust.