One will get you banned from the Tour de France - the other will not...
I confess I'm one of the lycra brigade people (they're not all guys!), and have spent money on trying to save those couple of extra grams.
However, for me, I like cycling also for the exercise benefits - and using an electric monitor would remove all those benefits.
Although for somebody who doesn't want to pedal - I think they're great! You get many of the benefits, without arriving as sweaty.