Not sure if the OP is still wanting info on this but here is my input.
1. If you're looking for something really easy and fast, even kid friendly, extracts are the way to go. I tried an extract once, followed the directions to a T and it was awful. It may be that I didn't try the "good" kind, so I do keep an eye out to see what people are using and enjoying. I may give it another shot for those times that I get an itch and have no time to brew up a batch.
2. In regards to A&W, my wife is a HUGE fan of A&W, as am I, but duplicating it I feel is impossible. Not sure if anyone else has had any luck, but when I inquired about it I was given a list that looked more like a science experiment than a recipe. I am still planning to work on a recipe that will not only have the body, but that strong vanilla flavor. Those are the two things I love about A&W.