exactly what kingfalcon said. What are your goals and how important a factor is the money to you? I'd probably also drop Simon from your list as I don't think the ROI would be nearly as great as the other two. There is quite a significant drop in ROI once after about the top 20 schools. Texas places very well, and all of the top companies recruit there. The main difference between Texas and Duke is that Texas is more of a regional school so more companies will be hiring for their texas offices. Duke will have more national recruiting, and it has a little more prestige.
I voted for Texas simply because I think you should go ahead and pay the Texas deposit and hold your spot there. Like I said I'd drop Simon. If Duke accepts you on the 10th, then you'll need to figure out what your goals are, and whether the money from Texas outweighs the step up in prestige of Fuqua. Definitely don't forego paying the deposit at Texas with the hopes that Duke accepts you. Round 3 can be pretty tough to crack.