There’s no one best, because different things will work with different people. And of course fit different budgets. Also, the devices available vary somewhat by region, so the ones available to community members in the US will be different than the ones available to community members in the UK.
You can see how the various sensors differ in terms of features by looking at the device class features FAQ: ( The topic title is a clickable link)
If you don’t get enough information from the FAQ, give us a few more details on what specifically you’re looking for and what your budget is and what country you live in and people may be able to give suggestions.
