Jay, I looked up Rocky Mountain... That looks like a good compromise: the aesthetics and track layout/elements of a wooden coaster, but the smoother ride of a steel track. I like that.
I've only been to Six Flags once, ten years ago; we weren't there the whole day and I wasn't allowed on any rides that went upside-down, so after waiting some 2+ hours in line for The Boss and riding a couple of the more carnival-like rides, we didn't do much more than that. So I haven't been on American Thunder; was that there back then or is it newer?