I have this little Radio Shack microscope with 100x power and a small light powered by 2 AAA batteries
Illuminated Microscope : Microscopes | RadioShack.com. It helps me find microscopic chips, burrs, and an uneven bevel, but even when it looks clean as a whistle there have been times that the razor didn't shave well. But it is a useful little tool (after you learn to hold it still) and for $12.99 it is certainly worth a try.
For me, I have been unable to see with anything less powerful than 100x. I had a 16x loupe like you're talking about but couldn't see anything. I got a little 60x microscope off ebay and I can't really use it. I also tried a couple of kid's microscopes that had something like 300x power but I couldn't find the razor on it. I don't know why.