I currently do not see the need to change the slider engine. Nivo is very powerful and for me really fast in chrome, opera and firefox.
In addition it is highly customizable. It can look like that:
http://nivo.dev7studios.com/demos/4/ (thumbnails)
http://www.songoperated.com/ (background version)
But well my plugin mainly provides the bridge between vb4-articles and the slider. What the slider does look like is up to the user.