Since I’m working on a PowerPivot presentation for the GPUG Summit in October I thought this post on the ROI Quadrant might be interesting to you. Just a note, this is geared more toward ad hoc BI tools, not really CPM offerings.
Mini-Post 2 of 2: PivotLink, Birst, QlikView, and “Desktop-Only” PowerPivot added to ROI Quadrant « PowerPivotPro
Archived post from 2012. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.