Dynamic image scroller, with popups

We are (again!) looking for someone who can actually do what they say they can do. We need an image scroller, that runs very very smoothly in all browsers, the images are to be pulled from a database (mySQL) and they are to have popups when clicked on (again the information is to be pulled from the database). We have very definite ideas on the design and layout and functionality. We dont care if the solution is AJAX or Flash, so long as it works, works well, and works all the time. This is the third time we've posted, the first provider got close, the second wasted our time for days, so we need someone who can really do it, money is being wasted on a ridiculous rate and our client is becoming more and more fracious. I need a real expert to get this done, and done fast.