I'm really no expert on computer cases, at all lol. But really as long as a case has an overall 4 or 5 star rating from at least a dozen people I assume it to be good enough. You also have to think that since the case is what is seen by everyone, it's important that the the person likes the look of it more than say one case has an extra fan mount.
I'm from TN myself, so I understand your problem. Really, all you can do is order as much of what you can on Amazon and get the rest from wherever is cheapest. That will take off some of the tax at least.