Which is healthier out of soy milk, almond milk and rice milk?

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I am a vegetarian and am lactose intolerant (I have just always drunk lactose free cow's milk) and don't really have very much milk at all but have decided to just replace it because I think I will slowly go vegan. So I was wondering which out of the 3 milks I listed is the healthiest, which is the least healthy and which one is the lowest in calories and the highest (I will go for the highest because I could gain 20 pounds and still be underweight) and which tastes the best(I used to drink quite a bit of soy milk and I enjoy it but have never tasted rice or almond milk)? Thank you.