I am making a starter; my question was whether or not the 16 oz water - 1/2 cup DME was sufficient for a 1.06 brew. I've seen some say it's good for up to 1.06, but other say it's only good up to 1.055. The starter is already made at this point, though, so I'm going to give it a go and see what happens.
Your smack pack is good up to 1.055 without a starter, so the starter you made will be perfect. You'll be pitching a healthy bit of yeast and should have a nice clean fermentation.