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An Elegant Slideshow with a Plethora of Features  
delicate-arch-Mellow-dreamstime
 
This slideshow works well for any kind of business, from art to computers. Even though it looks simple, the number of features can fulfill nearly all your requirements.  
Pros  
Images load from a separate folder only when called, greatly decreasing page download time.  
Completely customizable.  
Smooth animation fade between images.  
Animation can be turned off if Flash is used on the same page.  
The paginator toolbar can be placed above or below the picture, or it can overprint the picture at the top or the bottom (shown above here).  
The Pause button on the paginator can be turned on or off.  
The play controls can be placed above or below the picture, or they can overprint the picture at the top or the bottom (shown below here).  
The rotator mode can be either a seamless loop function or it can auto-reverse.  
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Cons
The pause function on the paginator can be a little tricky to operate if the optional pause button and the mouse-over pause function are included together. In that case it needs to be approached outside the image or the mouse-over pause function takes precedence and the button will already be in pause mode when clicked, thus restarting the play.
The rotation time can be controlled to the speed you desire.  
The rotator mode can be set up to start with the first image or with a random image.  
The rotation fade time can be controlled.  
Mouse-over pause function on the image.  
Description bar can be deleted during setup or can be turned on and off by using the "x" and "i" on the bottom right side of the image.  
Description bar grows to fit the text within, but unless all the descriptions are the same size, the description bar does not move off smoothly (problem demonstrated).