My problem isn't creating a maximum for one case but should be a maximum period. I've been a bit of a nut looking and searching for the perfect case for me. Through that search, I've spent well over $100 and closer to the $200 which is utterly ridiculous. I've pretty much finished and not planning to purchase any more, but I still check out the MacRumors iPhone accessory thread every day so we'll see....
I would have purchased my perfect case and one back up and not really worried about the price if I could have just found it the first time around. And then when I do find the best style case, it's changed for the release of the next iPhone.