If you really want to win, task your sound designer with regularly recreating the best sounds from the current Billboard charts and Grammy award winning songs. This is a no brainer, all the kids would eat it up. They wouldn't even have to be perfect, just 'close enough'. You could even blog and YouTube the howto. There is no better way to show off the features and capabilities of the synths you're selling, and if you can't do it with them, you know what you need to work on.