YEAH, another Michigan bride.. I'm actually getting married at the Sheraton in June, it's actually really close to Fiesta Americana & the Hilton. The FA and Hilton (I think) are AI resorts where the Sheraton is not. For us we enjoy eating out at different locations when we travel so we weren't interested in doing AI. I think all three places you mentioned would be very nice. There are several Hilton brides on here, so getting information on that resort would be pretty easy, and of course feel free to ask me anything about the Sheraton.
Welcome and congrats on your engagement.