I've got similar software and workflow. I rely heavily on PM for keywording and to render JPEG's. Capture NX2 is my primary editor with heavy reliance on Color Efex within Capture.
The issue I struggle with is the impact on workflow - both current images and historical - from use of Lightroom. I have a pretty clean workflow today that would be enhanced with a catalog - such as the one planned for release by PM. I've got more than 100,000 images edited with a Nikon based workflow and dread the thought of introducing different types of files - either NEF files edited in two incompatible systems or adding TIFF files. If I had a Camera RAW based workflow or a TIFF based workflow I would probably have the same issue in moving to Capture.