Thanks again you are all so helpful, it is so great finding this forum where everyone is so willing to give advice based on their own experiences.
So we have started to narrow it down, but probably not in the most conventional of ways!! My FI went to his cousin's wedding in the Dominican Republic before we met, and we just went to our best friends wedding in Riviera Maya - both were stunning weddings but we have decided not to go to either of those areas as we feel that we would be taking away from their wedding experiences, we would rather leave those places special for them.
I am really tempted with Italy, I spent some time studying and working out there, and I love it, but we have to work out the logistics and the expense of it. We spent a week in the RIU in Aruba in January, and that was gorgeous, but I want to look more into the Carribbean islands, and also if Italy does not work out then maybe the Californian vineyards.
I think that my FI is in for a really fun weekend this weekend with all these discussions ... I am so scared that I am going to turn into bridezilla!!!!!
Thanks again to you all, A