Hi folks.. Need a little advice here. I am a professional photographer and am about to get my first Ipad. I need something that has a very decent battery life, a superb display, sim capability of course. I also have a massive pdf collection and photography portfolio that I'd like to be able to display to clients and basically using it to manage my business while on the go. I also am involved in music production with Logic Pro so compatibility across that board will also be required. I currently own a MacBook Pro and soon a high end Imac so would need all items to integrate seamlessly. What do you folks recommend would be the best choice of Ipad for someone like me? Thank you..