For my Slide Show needs, I am quite enamored with Graphic Converter. Lots of options.
I use it primarily to drift thru and entire download of digital camera pix in Slide Show mode, editting as I go ( rotate image, delete image , stop and amend text or ranking, etc etc etc ).
Graphic Converter is too often overlooked. It's the best value shareware product for the Mac, period.
$ 30.