DNA testing?

My SO and I would like to get DNA tests done to see the likelihood of looks in our future children. Also to see what their backgrounds will look like coming from the both of us. What is a good, trustworthy company to use? If possible, what is the roundabout cost of the kit? How do I go about getting the kit? I do not trust buying one from a drugstore, even if it is supposedly the "name brand".

Edit #1: I know they cannot guess what future children will look like, I want to see mine and his together and figure the rest out myself! I know they cannot test future DNA that does not exist.