You have a good budget to work with. I would suggest test riding different materials and different geometries. Try different companies, Cannondale's Synapse in carbon will be different than a Trek Madone that will be different than Specialized Ruby.
You are happy with Giant, what about their upgraded women's bike? What changes do you want to have in your new bike? Better drivetrain? Different frame material? Different geometry? I guess what I am saying is tell us what is important to you, I could gush all day about my bike but really where would that get you?
Amanda
2011 Specialized Epic Comp 29er | Specialized Phenom | "Marie Laveau"
2007 Cannondale Synapse Carbon Road | Selle Italia Lady Gel Flow | "Miranda"
You don't have to be great to get started, but you do have to get started to be great. -Lee J. Colan