Rocket,
I use chocolate PlantFusion, unsweetened vanilla almond milk with ice in my vitamix and it tastes like a ice cream shake. (well pretty close)
If you can eat bananas and peanut butter add them to the above and the shake is awesome.
Almond Milk has twice the calcium as milk and maybe you can tolerate it. I haven't tried rice or soy milk. I like it as it only has 30 calories per cup!