Hi Dean,
I went through the NIK 30 day trial and was very impressed with both the noise reduction and sharpening solutions that come with that suite. I also loved the SilverEfex.
The one option that stands out to me with noise reduction and sharpening from Nik, is the ability to perform both functions by "painting". I am not sure if the painting option is available using Nik as a standalone program, but when used with Photoshop Elements ($99), the option is there when opening Nik to bring the image back into PS and use a paint brush at different sizes and opacity to "brush in" both the noise reduction and sharpening. It creates an automatic mask in the PS layers and is extremely easy to use.
My workflow during the trial was initial noise reduction in ACR (very low - no more than 3 - 5%). I did not do any sharpening at all in ACR, because in the NIK Sharpening Pro module you have the choice of both RAW (creative) and OUTPUT (for print) sharpening. The OUTPUT method gave you different choices including inkjet, distance from viewer to the art, type of paper... etc. Great options if printing your own work. When I first used that OUTPUT method in the inkjet mode, I could not believe the heavy sharpening that was done. But from what I was told by a processing pro at a local camera and software shop, the NIK OUTPUT sharpening will look like there are extreme artifacts, but it all works out when printed.
The RAW sharpening is a great tool within the NIK module and once again allows you to selectively sharpen areas of interest, rather than applying to the entire image and potentially increasing noise in shadows or bokeh.
I loved it.
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EDIT - You only want to use the RAW (creative) sharpening in NIK prior to uploading to FAA or another POD online. The OUTPUT sharpening is only meant to be done just before being printed (or to an image being saved specifically for printing). The OUTPUT sharpening method would look like garbage on the FAA display image.
We have been told now that the FAA fulfillment printers take care of OUTPUT sharpening, so no need to do it prior to upload.