When you first sit down with your wedding stylist be honest about your budget. There is no point in having your heart set on a decorative idea or concept that doesn't fit into your wedding budget, it will make it very hard for you to imagine having anything less.
Don't choose a wedding decorator on price alone. Judge a decorators style by what they have done in the past and what they can show you they can create. A wedding decorator's style is a flair reflected in their work so you need to find someone who sees things the way you do, particularly if you are giving them full decorative rein.