Electronic ones are cheap enough these days (often in Lidl/Aldi), and have the option of imperial/metric convertions.
I generally use a metric dial one, so I'm not battery dependent, but it does mean committing to one set of units, metric has to be the way to go now..
Vernier, in the true sense of the word, is probably not the way to go - the imperial version particularly, can be difficult to read. Dial, or digital, display is the best for occasional use.