>I ended up exploring the options in the aftermarket, but >recently decided to simply get the MB-D14. I just figured >that, rather than second guess myself after the fact, I would >just get what I know will work without issue.
I think you made the right choice. It's a personal decision, and for me, I prefer such attachments as well as batteries to be Nikon branded just in case there are any issues that might fall under the warranty period.
There had been early on some issues with non-Nikon batteries exploding inside D70/s cameras. Nikon had no responsibility to fix the damaged cameras. If a Nikon battery blows or otherwise damages the camera, you're covered.