Ok, so the PNT bag is the way to go. I've been told the 737 bag is the one to get because you won't miss that extra inch of width, and it will ALWAYS fit in the airplane, regardless of which one you are on. The Harbor Freight Tools case is a new one to me. I hadn't heard it suggested yet. Seems like it would be durable because of the aluminum casing. I also have seen the Scott cases. I like them. I just don't know about the cost up front. Do they have a decent warranty?
I think I'll probably buy the PNT bag, and I'll skimp on the flight case at first.