When I decided to ditch Lightroom, one thing that I looked for in a replacement was the ability to geolocate images. My two cameras both gave GPS built in, but I have many images where I want to add the GPS information.
In my search I ditched Perfect Browser 10. Although it claims to support entering GPS co-ordinates, this would not work in practice. I have to say that the OnOne help service did try to resolve this for me, but unsuccessfully.
I finally settled on ACDSee which allows selecting a location from a map to insert into the metadata. Not as slick as in Lightroom, but it works.
Please include this in your planned DAM. If you do, I promise to ditch ACDSee!
John