I wear glasses and what I discovered is that 5x magnification works best for makeup application. The higher magnifying mirrors have smaller fields of view, your features are distorted, and you can't see your whole face. Of course, your eyesight may require the greater magnification, but if you have a chance to try 5x, I would.
I wish I had a brand I could recommend, but I am on the hunt also. I have a tabletop Magic Focus mirror with 5x magnification that is great. It is slightly damaged (when I forgot my carryon bag was still sitting in the driveway and backed over it!), which is the only reason I am looking for one. Still, it is usable, not cracked or broken, just has a spot on the outer edge, so I'm not desperate yet. The company was based in Oklahoma, I think, or Kansas, and went out of business. I have looked everywhere and there is no tabletop to be found. There might be compact sizes.