The ERP Software Blog has a poll. When thinking about GP Next, this is a topic we are interested in. Please vote
http://www.erpsoftwareblog.com/2012/09/what-is-your-favorite-reporting-tool-to-use-with-microsoft-dynamics-gp/
If you need more info on the products available like the ones in the poll, reporting software is a really useful resource! www.reportingsoftware.info
I found out that one of the best resources for this can be found at this page www.reportingsoftware.info/.../reporting-software-the-gray-matter-behind-the-concept