Whether it's sweet or salty, there's always a time for some deepfried food is not the best for you, so use your fryer in moderation.
There's really only one way to deep fry things, so the differences between the fryer models are size and features. Here are the recommended options for each size, based on Amazon's reviews (both number of stars and number of reviews).
If you're looking for variation on the fryers above, check out the below. These fryers come loaded with features including automatic oil drainage, adjustable thermostat and cool touch handles.