Integrated Graphics Card not up to my expectations..

No, no such thing for full-fledged high end graphics cards. Most graphics cards these days weigh 1 - 3 pounds anyway, so you wouldn't want to lug that around with you. One of the disadvantages of a laptop is that they are not very customizable once they get to you. The tradeoff is that you get a lot higher mobility with a laptop compared to a desktop. You have to live with it.